For those with UK bank accounts only:

Until 12.00pm UK time on Thursday 26 May, book a hotel with Hotels.com through Earnaway using this link [note: this is not an affiliate link], and you'll get £20 cashback on bookings over £20.

The value you'll get from that will depend on your exact requirements and preferences of course, but it really will take a chunk off any stay. As an example, I found UK hotels for as little as £4 a night with the cashback.

The offer is for existing, as well as new, Earnaway users too.