diff --git a/assets/css/admin-tables.css b/assets/css/admin-tables.css
index 40f1ef39b85..aa72566453f 100644
--- a/assets/css/admin-tables.css
+++ b/assets/css/admin-tables.css
@@ -33,7 +33,10 @@
 	margin-left: 10px;
 }
 td.column-found_elements_and_attributes {
-	color: #c06e60;
+	color: #970010;
+}
+td.column-found_elements_and_attributes div {
+	margin-bottom: 0.6rem;
 }
 .column-error_status .dashicons-flag.new {
 	color: #d98501;
diff --git a/assets/css/amp-validation-error-taxonomy.css b/assets/css/amp-validation-error-taxonomy.css
index ffd3b6c58b8..ed56caf5a35 100644
--- a/assets/css/amp-validation-error-taxonomy.css
+++ b/assets/css/amp-validation-error-taxonomy.css
@@ -6,6 +6,11 @@
 	width: auto;
 }
 
+/* Move the 'All dates' filter to the right of the new status and type filters */
+#filter-by-date {
+	float: none;
+}
+
 /* Improve column widths */
 td.column-details pre,
 td.column-sources pre {
@@ -17,6 +22,10 @@ th.column-error_type {
 	width: 15%;
 }
 
+td.column-error .error-code {
+	font-family: Consolas, Monaco, monospace;
+}
+
 th.column-status {
 	width: 15%;
 }
@@ -115,6 +124,7 @@ details.single-error-detail[open] .single-error-detail-summary::after {
 	flex-direction: column;
 	height: 14px;
 	padding: 0;
+	margin-top: 4px;
 	background: none;
 	border: none;
 	cursor: pointer;
@@ -138,6 +148,7 @@ details.single-error-detail[open] .single-error-detail-summary::after {
 .status-text {
 	display: flex;
 	align-items: center;
+	padding-bottom: 0.6rem;
 }
 
 .status-text::before {
@@ -217,6 +228,7 @@ body.taxonomy-amp_validation_error .wp-list-table .new th.check-column input {
 
 .notice.accept-reject-error {
 	display: flex;
+	margin-bottom: 0;
 }
 
 .notice.accept-reject-error > p {
@@ -239,10 +251,19 @@ body.taxonomy-amp_validation_error .wp-list-table .new th.check-column input {
 	/* @todo Add red colors */
 }
 
+.notice.error-details {
+	margin-top: 1px;
+}
+
 .wp-heading-inline .status-text {
 	display: inline-flex;
 	margin-left: 10px;
 	vertical-align: middle;
+	padding-bottom: 0;
+}
+
+.wp-heading-inline code {
+	font-size: 1rem;
 }
 
 /** Details post action. */
diff --git a/assets/css/amp-validation-single-error-url.css b/assets/css/amp-validation-single-error-url.css
index b2ce80d67fa..aad67726cf1 100644
--- a/assets/css/amp-validation-single-error-url.css
+++ b/assets/css/amp-validation-single-error-url.css
@@ -20,6 +20,7 @@
 	justify-content: center;
 	width: 12px;
 	height: 18px;
+	margin-top: 5px;
 	background-image: url("../images/down-triangle.svg");
 	background-size: contain;
 	background-repeat: no-repeat;
@@ -58,6 +59,10 @@ table.striped > tbody > tr.even {
 }
 
 /** Details row styles. */
+.details details.details-attributes:hover {
+	cursor: pointer;
+}
+
 .details ul.detailed {
 	padding: 0 32px;
 	margin-top: 0;
@@ -65,6 +70,7 @@ table.striped > tbody > tr.even {
 
 .details div.detailed {
 	padding-left: 30px;
+	margin-top: 10px;
 	font-family: Consolas, Monaco, monospace;
 }
 
@@ -88,10 +94,6 @@ table.striped > tbody > tr.even {
 	margin-top: 0.2rem;
 }
 
-#amp_validation_status #amp-enabled-icon {
-	margin-bottom: 1.2rem;
-}
-
 #number-errors {
 	text-align: center;
 	background-color: #d3d3d3b8;
@@ -119,3 +121,31 @@ table.striped > tbody > tr.even {
 .wp-list-table th.column-status {
 	width: 20%;
 }
+
+.wp-list-table th.column-error {
+	width: 30%;
+}
+
+/** Add space between list table and the filter and search box above it. */
+#post-body-content button.action,
+#post-body-content #url-post-filter,
+#post-body-content .search-box {
+	margin-bottom: 4px;
+}
+
+#post-body-content button.reject {
+	margin-left: 4px;
+}
+
+#accept-reject-buttons:not(.hidden) {
+	display: inline-block;
+}
+
+#vertical-divider {
+	display: inline-block;
+	vertical-align: middle;
+	width: 15px;
+	margin-right: 15px;
+	height: 30px;
+	border-right: 1px solid #a0a5aa;
+}
diff --git a/assets/js/amp-invalid-url-post-edit-screen.js b/assets/js/amp-invalid-url-post-edit-screen.js
index 4a56afeb0a1..f0d4f5130af 100644
--- a/assets/js/amp-invalid-url-post-edit-screen.js
+++ b/assets/js/amp-invalid-url-post-edit-screen.js
@@ -323,6 +323,7 @@ const ampInvalidUrlPostEditScreen = ( function() { // eslint-disable-line no-unu
 	component.handleBulkActions = function handleBulkActions() {
 		const acceptButton = document.querySelector( 'button.action.accept' );
 		const rejectButton = document.querySelector( 'button.action.reject' );
+		const acceptAndRejectContainer = document.getElementById( 'accept-reject-buttons' );
 
 		const onChange = function( event ) {
 			let areThereCheckedBoxes;
@@ -333,8 +334,7 @@ const ampInvalidUrlPostEditScreen = ( function() { // eslint-disable-line no-unu
 
 			if ( event.target.checked ) {
 				// This checkbox was checked, so ensure the buttons display.
-				acceptButton.classList.remove( 'hidden' );
-				rejectButton.classList.remove( 'hidden' );
+				acceptAndRejectContainer.classList.remove( 'hidden' );
 			} else {
 				/*
 				 * This checkbox was unchecked.
@@ -348,8 +348,7 @@ const ampInvalidUrlPostEditScreen = ( function() { // eslint-disable-line no-unu
 					}
 				} );
 				if ( ! areThereCheckedBoxes ) {
-					acceptButton.classList.add( 'hidden' );
-					rejectButton.classList.add( 'hidden' );
+					acceptAndRejectContainer.classList.add( 'hidden' );
 				}
 			}
 		};
diff --git a/includes/validation/class-amp-invalid-url-post-type.php b/includes/validation/class-amp-invalid-url-post-type.php
index 5aecab49cda..d5bdd96809e 100644
--- a/includes/validation/class-amp-invalid-url-post-type.php
+++ b/includes/validation/class-amp-invalid-url-post-type.php
@@ -475,7 +475,7 @@ public static function display_invalid_url_validation_error_counts_summary( $pos
 			</span>
 			<?php
 		}
-		echo implode( '<br>', $result ); // WPCS: xss ok.
+		echo implode( '', $result ); // WPCS: xss ok.
 	}
 
 	/**
@@ -904,7 +904,8 @@ public static function output_custom_column( $column_name, $post_id ) {
 					}
 				}
 				if ( ! empty( $items ) ) {
-					echo implode( ',<br/>', $items ); // WPCS: XSS OK.
+					$imploded_items = implode( ',</div><div>', $items );
+					echo sprintf( '<div>%s</div>', $imploded_items ); // WPCS: XSS OK.
 				} else {
 					esc_html_e( '--', 'amp' );
 				}
@@ -1210,15 +1211,7 @@ public static function print_admin_notice() {
 			$error_code       = isset( $description['code'] ) ? $description['code'] : 'error';
 			$error_title      = \AMP_Validation_Error_Taxonomy::get_error_title_from_code( $error_code );
 			$validation_error = json_decode( $error->description, true );
-			?>
-			<div class="notice">
-				<ul>
-					<?php echo AMP_Validation_Error_Taxonomy::render_single_url_error_details( $validation_error, $error ); // WPCS : XSS OK. ?>
-				</ul>
-			</div>
-
-			<?php
-			$accept_all_url = wp_nonce_url(
+			$accept_all_url   = wp_nonce_url(
 				add_query_arg(
 					array(
 						'action'  => AMP_Validation_Error_Taxonomy::VALIDATION_ERROR_ACCEPT_ACTION,
@@ -1227,7 +1220,7 @@ public static function print_admin_notice() {
 				),
 				AMP_Validation_Error_Taxonomy::VALIDATION_ERROR_ACCEPT_ACTION
 			);
-			$reject_all_url = wp_nonce_url(
+			$reject_all_url   = wp_nonce_url(
 				add_query_arg(
 					array(
 						'action'  => AMP_Validation_Error_Taxonomy::VALIDATION_ERROR_REJECT_ACTION,
@@ -1282,6 +1275,14 @@ public static function print_admin_notice() {
 				echo '</div>';
 			}
 
+			?>
+			<div class="notice error-details">
+				<ul>
+					<?php echo AMP_Validation_Error_Taxonomy::render_single_url_error_details( $validation_error, $error ); // WPCS : XSS OK. ?>
+				</ul>
+			</div>
+			<?php
+
 			$heading = sprintf(
 				'%s: <code>%s</code>%s',
 				esc_html( $error_title ),
@@ -1772,8 +1773,11 @@ public static function render_single_url_list_table( $post ) {
 			<?php $wp_list_table->search_box( esc_html__( 'Search Errors', 'amp' ), 'invalid-url-search' ); ?>
 		</form>
 
-		<button type="button" class="hidden button action accept"><?php esc_html_e( 'Accept', 'amp' ); ?></button>
-		<button type="button" class="hidden button action reject"><?php esc_html_e( 'Reject', 'amp' ); ?></button>
+		<div id="accept-reject-buttons" class="hidden">
+			<button type="button" class="button action accept"><?php esc_html_e( 'Accept', 'amp' ); ?></button>
+			<button type="button" class="button action reject"><?php esc_html_e( 'Reject', 'amp' ); ?></button>
+			<div id="vertical-divider"></div>
+		</div>
 		<div id="url-post-filter" class="alignleft actions">
 			<?php AMP_Validation_Error_Taxonomy::render_error_type_filter(); ?>
 		</div>
diff --git a/includes/validation/class-amp-validation-error-taxonomy.php b/includes/validation/class-amp-validation-error-taxonomy.php
index 453c03b9216..8e7d0cd2f51 100644
--- a/includes/validation/class-amp-validation-error-taxonomy.php
+++ b/includes/validation/class-amp-validation-error-taxonomy.php
@@ -1662,7 +1662,7 @@ public static function filter_manage_custom_columns( $content, $column_name, $te
 				} else {
 					$content .= '<p>';
 					$content .= sprintf(
-						'<a href="%s"><code>%s</code></a>',
+						'<a href="%s" class="error-code">%s</a>',
 						admin_url( add_query_arg( array(
 							self::TAXONOMY_SLUG => $term->name,
 							'post_type'         => AMP_Invalid_URL_Post_Type::POST_TYPE_SLUG,
diff --git a/tests/validation/test-class-amp-invalid-url-post-type.php b/tests/validation/test-class-amp-invalid-url-post-type.php
index 6c979526001..486cae2220e 100644
--- a/tests/validation/test-class-amp-invalid-url-post-type.php
+++ b/tests/validation/test-class-amp-invalid-url-post-type.php
@@ -1237,8 +1237,9 @@ public function test_render_single_url_list_table() {
 		AMP_Invalid_URL_Post_Type::render_single_url_list_table( $post_correct_post_type );
 		$output = ob_get_clean();
 		$this->assertContains( '<form class="search-form wp-clearfix" method="get">', $output );
-		$this->assertContains( '<button type="button" class="hidden button action accept">', $output );
-		$this->assertContains( '<button type="button" class="hidden button action reject">', $output );
+		$this->assertContains( '<div id="accept-reject-buttons" class="hidden">', $output );
+		$this->assertContains( '<button type="button" class="button action accept">', $output );
+		$this->assertContains( '<button type="button" class="button action reject">', $output );
 	}
 
 	/**