Just used Transferwise and saved just over £18. If I had used a bank, or building society, the transfer would have cost £18 more on average due to their higher charges and poorer exchange rates.
I have now been using them for over 3 years. They have saved me lots of money over that time, save yourself some money yourself try it free:
Once you have used it the first time susbsequent times get easier and easier...
BTW Great service Transferwise, quick, easy and kept me updated at each stage. Thanks Transferwise.