Times currency services

Currency Fair and Transferwise are quoting 1.253 net. Their rates are not guaranteed, but I've use TW loads of times for £1-5K transfers and have always hit or bettered the estimated rate. It may be slightly better tomorrow, but I'm not too sure you'll do much better tbh as the euro's been a couple of centimes up from it's recent lowest over the past week or two. If you don't already have accounts with these firms bear in mind they'll probably want a passport copy by e-mail before transferring this amount.
For a further £15, e-mail me off my website and I'll "introduce" you.
Steve

CurrencyFair operate an excellent service. If you go on their market place, you can actually beat the interbank rate. NOBODY does that!

Used them a few times to send dollars to Oz. Quick and reliable.

Here's a clip from the Transferwise e-mail re a transfer of £1000 to euros that I made yesterday 18th.
"All done! The money should arrive by Monday, 9 AM The final rate was 1 GBP Pound Sterling = 1.2746 EUR Euro, and we charged you £4.98 for the service."
Yesterday's spot rate on the ECB website was 1.2714.
Steve

edit: transfer showing in my French account on afternoon of Friday 19th.