Singles356.com is a dating service that has members across England, Wales and the rest of the UK. It's a pay site that has a free to register option, with which it's possible to send winks and ice-breakers without becoming a paying member.
The free membership will let you get started by sending winks and icebreakers without paying. In order to use other features, however, you'll need a premium membership. Singles365 has been online for a few years now and boasts several thousand members. Whether you're looking for a casual date or a long term relationship, you'll be able to search for matches on this site.
I found Singles365 is reasonably easy to navigate, and that matches are easier to find than on many other UK sites. There are lots of success stories to read and other informational articles, as well, including articles on planning memorable dates.
A word or caution. Before you spend any money with this site, be sure to read the terms and conditions. Some users have reported getting billed for more money than they expected and reported having trouble with customer service. Not uncommon with dating services.