No.1 Currency are the best I have been able to find. 1.968 is the rate today, not much of a difference from the rest but they do not charge you comission which most of the others do.
Phil - if you have a Nationwide account you can withdraw from the ATMs with no charge and may get a slightly better rate otherwise - with the way it is sliding - there is not a lot difference now buying here or there. Sadly.
I ended up with a load left from last year - perhaps I should start selling them on the black market - oh no, silly me - I will need them in March