RWTF, BSA is British Small Arms, which made motorcyles before the war and quite a while after it. I don't know about blind panic. The British Expeditionary Force was assisting the French and Belgians against the German blitzkreig, to sustain the French at almost any cost. The Canadian 1st Infantry Brigade was ready to sail from Dover. The British somehow managed to withdraw 338,000 men from the beaches, a logistical miracle under the circumstances.