Buying a personal plate before the V5 has come back?

[TroubledSoul]

Obviously you can't put it on the car before the V5 comes back, but is there any barrier to buying the plate? It would be a birthday present for the Mrs. Something a bit silly I suppose but it's harmless fun.

I'm just keen to know if there's any reason (be nice!) not to before the DVLA have returned the V5 in her name?

[TroubledSoul]

Awesome, thanks guys.