I've been looking for a thing like this past few months.
It says "inspired by Snapchat", and frankly, it's no lie. The great thing about it is you can download their app on your smartphone, and use it pretty much like any other app. There is a tone of members constantly available, you can chat with them, and even set up an appointment whenever you like.
Don't get confused, it is not just for UK people. Here I've met a lot of them from all over Europe, and I'm looking forward to the upcoming summer vacation off in Southern France with this broad I've met here.