diff --git a/wcomponents-core/src/main/java/com/github/bordertech/wcomponents/render/webxml/WTextAreaRenderer.java b/wcomponents-core/src/main/java/com/github/bordertech/wcomponents/render/webxml/WTextAreaRenderer.java
index dde6e0447..43cabc8b3 100755
--- a/wcomponents-core/src/main/java/com/github/bordertech/wcomponents/render/webxml/WTextAreaRenderer.java
+++ b/wcomponents-core/src/main/java/com/github/bordertech/wcomponents/render/webxml/WTextAreaRenderer.java
@@ -16,6 +16,8 @@
  */
 class WTextAreaRenderer extends AbstractWebXmlRenderer {
 
+	private static final String TAG_RTF = "wc-rtf";
+
 	/**
 	 * Paints the given WTextArea.
 	 *
@@ -66,7 +68,7 @@ public void doRender(final WComponent component, final WebXmlRenderContext rende
 			 * such as turning rich text features on or off, or specifying JSON config either as
 			 * a URL attribute or a nested CDATA section.
 			 */
-			xml.append("<ui:rtf />");
+			xml.append(String.format("<%s></%1$s>", TAG_RTF));
 		}
 
 		String textString = textArea.getText();
diff --git a/wcomponents-core/src/test/java/com/github/bordertech/wcomponents/render/webxml/WTextAreaRenderer_Test.java b/wcomponents-core/src/test/java/com/github/bordertech/wcomponents/render/webxml/WTextAreaRenderer_Test.java
index 495ce5693..06f88f695 100755
--- a/wcomponents-core/src/test/java/com/github/bordertech/wcomponents/render/webxml/WTextAreaRenderer_Test.java
+++ b/wcomponents-core/src/test/java/com/github/bordertech/wcomponents/render/webxml/WTextAreaRenderer_Test.java
@@ -88,42 +88,33 @@ public void testDoPaint() throws IOException, SAXException, XpathException {
 		assertXpathEvaluatesTo("40", "//ui:textarea/@cols", field);
 
 		field.setRichTextArea(false);
-		assertSchemaMatch(field);
-		assertXpathNotExists("//ui:textarea/ui:rtf", field);
+		assertXpathNotExists("//ui:textarea/html:wc-rtf", field);
 
 		field.setRichTextArea(true);
-		assertSchemaMatch(field);
-		assertXpathExists("//ui:textarea/ui:rtf", field);
+		assertXpathExists("//ui:textarea/html:wc-rtf", field);
 
 		field.setDefaultSubmitButton(button);
-		assertSchemaMatch(field);
 		assertXpathEvaluatesTo(button.getId(), "//ui:textarea/@buttonId", field);
 
 		field.setPattern("");
-		assertSchemaMatch(field);
 		assertXpathNotExists("//ui:textarea/@pattern", field);
 
 		// Pattern is not supported on the client for TextArea, and will not be rendered
 		field.setPattern("test[123]");
-		assertSchemaMatch(field);
 		assertXpathNotExists("//ui:textarea/@pattern", field);
 
 		field.setText("Hello");
-		assertSchemaMatch(field);
 		assertXpathEvaluatesTo(field.getText(), "normalize-space(//ui:textarea)", field);
 
 
 		field.setPlaceholder("enter stuff here");
-		assertSchemaMatch(field);
 		assertXpathEvaluatesTo("enter stuff here", "//ui:textarea/@placeholder", field);
 
 
 		field.setAutocomplete(AddressType.BILLING);
-		assertSchemaMatch(field);
 		assertXpathEvaluatesTo(field.getAutocomplete(), "//ui:textarea/@autocomplete", field);
 
 		field.setAutocompleteOff();
-		assertSchemaMatch(field);
 		assertXpathEvaluatesTo(AutocompleteUtil.getOff(), "//ui:textarea/@autocomplete", field);
 	}
 
diff --git a/wcomponents-theme/src/main/js/wc/ui/rtf.mjs b/wcomponents-theme/src/main/js/wc/ui/rtf.mjs
index 51a1058a7..85602e631 100755
--- a/wcomponents-theme/src/main/js/wc/ui/rtf.mjs
+++ b/wcomponents-theme/src/main/js/wc/ui/rtf.mjs
@@ -2,7 +2,7 @@
  * Provides a Rich Text Field implementation using tinyMCE.
  *
  * Optional module configuration.
- * The config member "initObj" can be set to an abject containing any tinyMCE cofiguration members **except**
+ * The config member "initObj" can be set to an abject containing any tinyMCE configuration members **except**
  * selector. This allows customised RTF per implementation. This should be added in the template
  */
 import initialise from "wc/dom/initialise.mjs";
@@ -45,7 +45,7 @@ function processNow(idArr) {
 	}
 }
 
-export default {
+const instance = {
 	/**
 	 * Register Rich Text Fields that need to be initialised.
 	 *
@@ -58,10 +58,16 @@ export default {
 			const callback = () => processNow(idArr);
 			initialise.addCallback((element) => {
 				if (!tinyMCE) {
-					const baseUrl = resourceLoader.getUrlFromImportMap("tinymce/");
-					return import("tinymce/tinymce.js").then(() => {
+					let baseUrl = resourceLoader.getUrlFromImportMap("tinymce/");
+
+					return import(`${baseUrl}tinymce.js`).then(() => {
 						tinyMCE = element.ownerDocument.defaultView.tinymce;
 						if (baseUrl) {
+							// remove trailing forward slash since TinyMCE adds its own
+							while (baseUrl.charAt(baseUrl.length - 1) === '/') {
+								baseUrl = baseUrl.substring(0, baseUrl.length - 1);
+							}
+
 							tinyMCE.baseURL = baseUrl;
 						}
 						callback();
@@ -72,3 +78,5 @@ export default {
 		}
 	}
 };
+
+export default instance;
diff --git a/wcomponents-theme/src/main/js/wc/ui/textArea.mjs b/wcomponents-theme/src/main/js/wc/ui/textArea.mjs
index c29ae326e..d6cb9982c 100644
--- a/wcomponents-theme/src/main/js/wc/ui/textArea.mjs
+++ b/wcomponents-theme/src/main/js/wc/ui/textArea.mjs
@@ -215,3 +215,17 @@ initialise.register({
 });
 
 export default instance;
+
+// Handle registration of rich text areas
+const rtfTag = "wc-rtf";
+class WRichTextField extends HTMLElement {
+	connectedCallback() {
+		import("wc/ui/rtf.mjs").then(({ default: c }) => {
+			c.register([this.parentElement.getAttribute("id")]);
+		});
+	}
+}
+
+if (!customElements.get(rtfTag)) {
+	customElements.define(rtfTag, WRichTextField);
+}
diff --git a/wcomponents-theme/src/test/resource/mock-modules/tinymce.js b/wcomponents-theme/src/test/resource/mock-modules/tinymce.js
new file mode 100644
index 000000000..4e6c7f038
--- /dev/null
+++ b/wcomponents-theme/src/test/resource/mock-modules/tinymce.js
@@ -0,0 +1,9 @@
+let tinymce = {
+	baseUrl : "",
+	init : function() {},
+	triggerSave : function() {}
+};
+
+document.defaultView.tinymce = tinymce;
+
+export default tinymce;
diff --git a/wcomponents-theme/src/test/spec/wc.dom.initialise.test.mjs b/wcomponents-theme/src/test/spec/wc.dom.initialise.test.mjs
index 502a76e5f..82a02e6ed 100644
--- a/wcomponents-theme/src/test/spec/wc.dom.initialise.test.mjs
+++ b/wcomponents-theme/src/test/spec/wc.dom.initialise.test.mjs
@@ -2,6 +2,15 @@ import initialise, {setView} from "wc/dom/initialise.mjs";
 import {setUpExternalHTML} from "../helpers/specUtils.mjs";
 
 describe("wc/dom/initialise", () => {
+	let origWindow;
+
+	beforeAll(() => {
+		origWindow = window;
+	});
+
+	afterAll(() => {
+		setView(origWindow);
+	});
 
 	beforeEach(() => {
 		return setUpExternalHTML("domUsefulDom.html").then(dom => {
diff --git a/wcomponents-theme/src/test/spec/wc.ui.rtf.test.mjs b/wcomponents-theme/src/test/spec/wc.ui.rtf.test.mjs
new file mode 100644
index 000000000..6a81df678
--- /dev/null
+++ b/wcomponents-theme/src/test/spec/wc.ui.rtf.test.mjs
@@ -0,0 +1,88 @@
+import rtf from "wc/ui/rtf.mjs";
+import initialise from "wc/dom/initialise.mjs";
+import tinymce from "../resource/mock-modules/tinymce.js";
+
+describe("wc/ui/rtf", () => {
+	let origHead;
+
+	beforeAll(() => {
+		origHead = window.document.head.innerHTML;
+
+		let importMap = window.document.createElement("script");
+		importMap.setAttribute("type", "importmap");
+		importMap.innerHTML =
+			`{
+				"imports": {
+					"tinymce/": "../../../../test/resource/mock-modules/"
+				}
+			}`;
+		window.document.head.append(importMap);
+	});
+
+	afterAll(() => {
+		window.document.head.innerHTML = origHead;
+		delete document.defaultView.tinymce;
+	});
+
+	it("sets a callback for every nonempty invocation of register", (done) => {
+		spyOn(initialise, "addCallback");
+		rtf.register(["exID", "anotherEx"]);
+		rtf.register(["exID"]);
+		rtf.register([]);
+
+		expect(initialise.addCallback).toHaveBeenCalledTimes(2);
+		done();
+	});
+
+	it("passes the correct selectors to TinyMCE on editor initialisation", (done) => {
+		const selectors = ["textarea#exID_input", "textarea#anotherEx_input"];
+		const expectedCalls = 2;
+		let callCount = 0;
+
+		const initSpy = spyOn(tinymce, "init").and.callFake(() => {
+			let givenSelector = initSpy.calls.mostRecent().args[0].selector;
+			expect(selectors).toContain(givenSelector);
+
+			if (selectors.includes(givenSelector)) {
+				if (++callCount === expectedCalls) {
+					done();
+				}
+
+				const idx = selectors.indexOf(givenSelector);
+				if (idx > -1) {
+					selectors.splice(idx, 1);
+				}
+			}
+		});
+
+		rtf.register(["exID"]);
+		rtf.register(["anotherEx"]);
+	});
+
+	it("passes the correct default plugins to TinyMCE on editor initialisation", (done) => {
+		const initSpy = spyOn(tinymce, "init").and.callFake(() => {
+			const defaultPlugins = ["autolink", "link", "lists", "advlist", "preview", "help"];
+
+			for (const plugin of defaultPlugins) {
+				expect(initSpy.calls.mostRecent().args[0].plugins).toContain(plugin);
+			}
+			done();
+		});
+
+		rtf.register(["exID"]);
+	});
+
+	it("passes the correct default tools to TinyMCE on editor initialisation", (done) => {
+		const initSpy = spyOn(tinymce, "init").and.callFake(() => {
+			const defaultTools = ["undo", "redo", "formatselect", "bold", "italic", "alignleft", "aligncenter",
+				"alignright", "alignjustify", "bullist", "numlist", "outdent", "indent", "removeformat", "help"];
+
+			for (const tool of defaultTools) {
+				expect(initSpy.calls.mostRecent().args[0].toolbar).toContain(tool);
+			}
+			done();
+		});
+
+		rtf.register(["exID"]);
+	});
+});
diff --git a/wcomponents-xslt/src/main/xslt/all.xsl b/wcomponents-xslt/src/main/xslt/all.xsl
index 328c51631..a18220990 100644
--- a/wcomponents-xslt/src/main/xslt/all.xsl
+++ b/wcomponents-xslt/src/main/xslt/all.xsl
@@ -334,7 +334,6 @@
 			select=".//ui:dropdown[@data and not(@type) and not(@readOnly)] | .//ui:listbox[@data and not(@readOnly)] | .//ui:shuffler[@data and not(@readOnly)]" />
 		<xsl:variable name="filedrops" select=".//ui:multifileupload[@ajax or @dropzone]" />
 		<xsl:variable name="multiDDData" select=".//ui:multidropdown[@data and not(@readOnly)]" />
-		<xsl:variable name="rtfs" select=".//ui:textarea[ui:rtf]" />
 		<xsl:variable name="eagerness" select="//*[@mode eq 'eager']" />
 		<xsl:variable name="editors" select=".//html:wc-imageedit" />
 		<xsl:variable name="tableActions" select=".//ui:table/ui:actions/ui:action" />
@@ -387,11 +386,6 @@
 				<xsl:apply-templates select="$multiDDData" mode="registerIds" />
 				<xsl:text>]);});</xsl:text>
 			</xsl:if>
-			<xsl:if test="$rtfs">
-				<xsl:text>import("wc/ui/rtf.mjs").then(({ default: c }) => {c.register([</xsl:text>
-				<xsl:apply-templates select="$rtfs" mode="registerIds" />
-				<xsl:text>]);});</xsl:text>
-			</xsl:if>
 			<xsl:if test="$eagerness">
 				<xsl:text>import("wc/ui/containerload.mjs").then(({ default: c }) => {c.register([</xsl:text>
 				<xsl:apply-templates select="$eagerness" mode="registerIds" />
diff --git a/wcomponents-xslt/src/main/xslt/wc.ui.textarea.xsl b/wcomponents-xslt/src/main/xslt/wc.ui.textarea.xsl
index 3be0b89f8..8b865f9b3 100644
--- a/wcomponents-xslt/src/main/xslt/wc.ui.textarea.xsl
+++ b/wcomponents-xslt/src/main/xslt/wc.ui.textarea.xsl
@@ -21,7 +21,7 @@
 	<xsl:template match="ui:textarea[@readOnly]">
 		<xsl:variable name="element">
 			<xsl:choose>
-				<xsl:when test="ui:rtf">div</xsl:when>
+				<xsl:when test="html:wc-rtf">div</xsl:when>
 				<xsl:otherwise>pre</xsl:otherwise>
 			</xsl:choose>
 		</xsl:variable>
@@ -41,7 +41,7 @@
 				</xsl:attribute>
 			</xsl:if>
 			<xsl:choose>
-				<xsl:when test="ui:rtf">
+				<xsl:when test="html:wc-rtf">
 					<xsl:apply-templates/>
 				</xsl:when>
 				<xsl:otherwise>
@@ -58,7 +58,7 @@
 		<xsl:variable name="tickerId" select="concat(@id, '_tick')"/>
 		<xsl:variable name="element">
 			<xsl:choose>
-				<xsl:when test="ui:rtf">
+				<xsl:when test="html:wc-rtf">
 					<xsl:text>div</xsl:text>
 				</xsl:when>
 				<xsl:otherwise>
@@ -166,10 +166,9 @@
 				<output for="{@id}_input" hidden="hidden" id="{$tickerId}" name="{$tickerId}"/>
 			</xsl:if>
 			<xsl:apply-templates select="ui:fieldindicator"/>
+			<xsl:apply-templates select="html:wc-rtf"/>
 		</xsl:element>
 	</xsl:template>
 
-	<xsl:template match="ui:rtf"/>
-
 
 </xsl:stylesheet>