I agree.
We do the same for prototype and small batches.
If we are forced to go to Mouser for some parts, we will probably go to them for all the parts.
In my experience, Mouser offer a superb UK service and it's not unknown for parts shipped to the UK from the US to get here before RS and Farnell parts shipped internally in the UK.
On a level playing field I would always choose UK suppliers but in the modern world the disadvantage that can be absorbed with a UK policy has to be quite small
