I know this deal has been posted a few times in the past. But hopefully this serves as a reminder.
First direct are paying £125 for using the 7 day account switching with them. This deal ends on the 31st of July, where the cashback changes back to £100. You also get £100 if your unsatisfied and leave after 6 months.
As always read the terms and conditions, but good luck if you do get the account.
Thanks to this blog for pointing out this offer to me:http://thesmartwallet.blogspot.co.uk/2014/07/how-i-got-225-guaranteed-return-on-my.html