Polyamory in the uk

[Cause66]

Hi all. I am lucky enough to be in a loving open marriage, but my long term lover has now moved into a monogamous relationship. We still love each other but it's just flirty platonic now. Am looking to meet someone new, but am kinda out of touch with where the best places to do so are now. Have looked at OK Cupid which has a reasonable poly community but they all seem to be in Brighton or Oxford. Tinder isn't working. Any advice welcome.

Thank you

Dave