I'm trying to find out the cheapest way to transfer a fairly large sum of money from an account in british pounds to an overseas euro account.
The amount is large enough that a fixed charge would probably be insignificant, but I'm worried about the profit margin on the exchange rate. All banks I know can't or won't tell you in advance what absolute rate you will get (such a quote could only be valid for minutes, as with quoted option prices), neither are they willing to give you a reference rate plus fixed margin, e.g. libor plus 0,5% or similar.
What's the best way to do this, i.e. cheapest and most transparant? Many thanks, David