Adding beta phase banner

app/assets/stylesheets/app.scss

@@ -19,4 +19,29 @@
     font-size: 19px;
     line-height: 1.31579;
   }
+}
+
+.phase-tag {
+    @include phase-tag(beta);
+}
+
+@media (min-width: 641px) {
+  .phase-tag {
+      font-size: 16px;
+      line-height: 1.25;
+      margin-top: 7px;
+
+  }
+}
+
+@media (max-width: 641px) {
+  .phase-tag {
+      margin-top: 11px;
+  }
+}
+
+
+
+#global-header #logo {
+      white-space: nowrap;
 }

app/templates/admin_template.html

@@ -7,5 +7,13 @@ GOV.UK notifications admin
 {% block cookie_message %}
 {% endblock %}
 
+ {% block inside_header %}
+<div class="phase-banner-beta">
+    
+      <strong class="phase-tag">BETA</strong>
+    
+</div>
+ {% endblock %}
+
 {% set global_header_text = "GOV.UK Notify" %}