I use Monzo, and would highly recommend them. Great customer support, very transparent (you can see their trello roadmap, they interact with the community via forums and Slack) and I love their product too (have switched over to their current account as primary bank account now). They have somre really great people working there too - if you're in London they have a lot of events and talks that are pretty interesting.

I use Monzo and Starling. I'm very happy with both of these and prefer them to my old bank (Halifax).

I've been a happy Monzo user for at least a year, but recently got a Starling account because they have Android Pay and Monzo don't.

I and a lot of my friends use Revolut and it's excellent. They're a very well funded FinTech startup and have been around for a few years.

I've used 2 out of 3 of those, they all work as expected and work with same day deposits