We have just picked ours up from p.o. around 140 to £ Did not think that bad for a walk in service, and no commission, on chqs if we took Euro no commission but sterling would cost about 1.5% commission. We always found the Marina gave a good exchange rate so do not bother too much, just take enough to see us through for a day or two, but now of course the a.t.m. is available, so hopefully no probs.