Hotel Tonight is an Android/iOS app that allows you to book hotel rooms for same day arrival for up to three nights at a time. They now have a promotion for up to $50 credit for signing up for the service.
Writing about this app has been on my list for a while, but I have never found their hotel selection or prices to be competitive. You can, however, have some deals by utilizing the $50 sign up credit.
All you need to do is to sign up for the service on their website here, choose the country as UK and to use BESTDAILY as the promo code.
You can then have $50 credit once you sign in using your mobile app.
No sure who originally found this offer, but I came across of it on a FlyerTalk post here.
Maybe I should finally give this app a try now that I have a $50 credit with them. There are so many hotel booking options and app nowadays, as the barriers to entry are close to zero.
I have no idea what the terms of this offer are, but the sign up credit should be valid for a year.