Just looked and the rate today is at 1.28 Euro to the Pound, I know the rate I get won't be that high what percentage do they usally take, am I right in thinking that if I exchanged today I would get something nearer to 1.20?
Major currency conversion companies show you mid market rates. The mid-market rates shown are neither "buy" rates nor "sell" rates. Mid-market rates are derived from mid-point between the buy and sell rates of large-value transactions in the global currency markets.
When the markets are closed over the weekend, comissions are more. Buy when the markets are open.