Hi Jan,
can you tell from the number on the plate what year the motorbike was built, or what period it was used?
Which British army corps does the plaque refer to? As mentioned above, the motorbike was purchased at the ARAR camp in Florence, I imagine as soon as the war ended. Knowing the period is important to me for the purchase of spare parts.
For example, which licence plate holder should I buy? In the various specialized sites I have seen several different types.