i know this is gonna sound really thick but i cant get my head round it to work it out if you have currency left over in this case its us dollars and you take it back to change back to uk pounds is it better for you the higher the exchange rate or lower eg tesco are doin it for 1.71 thomson 1.66 no commision at either store sorry for my thickness lol
The lower for converting to sterling. Best way to look at it is you only need to spend 1.66 dollars to get a pound instead of spending 1.71 to get a pound
Or if you know someone that is going to the US soon then sell it to them for a rate in between the buying and selling rate. That way you both get a better deal than you would in store.