YOu will need a Euro denominated account.
Barclays will let you have one for free, attached to your existing current account. They obviously want to fleece you by offering a really crap rate when you move funds from your sterling current account to you Euro account – dodge that by sending the money via transferwise to your Euro account.
I recently had a sizeable Euro purchase so moved chunks of sterling into my euro account over the course of 2 months so as to minimise timing risks.
With the rates where they are now, I might hedge a bit more as Id expect the rate to soften again after the general election if anything other than a conservative majority is the result 😉