HI istherehopeformeornot, I feel for you. I'm 43 and I am in London and I have been dating online on and off for the last few years. It's a bit different for me as I have two kids and I don't want anymore. Surprisingly, or unsurprisingly, men are generally not put off by me having children. I think men in London are generally pretty open-minded. Initially, I was very open about the fact I have kids before we meet but lately, I have not bothered as most men will ask the question if it matters to them and if it doesn't matter, they will usually find out on the first date when the topic comes out naturally in conversation and they are of the attitude, I assume you would have kids anyway at your age!
I have found the dating scene in London okay. You have to have strong boundaries. Any signs of game-playing, ditch. But I agree with the poster above, there is very little follow-through, I have been on so many first dates where the guy says he wants to see me again, and then tumbleweed... More often than not, they have had second thoughts and not bothered to get in touch. Ah well, their loss. I do think meeting someone you have chemistry with and who wants the same things as you is like looking for a needle in the haystack for ANYONE!
I did meet someone last year who was absolutely lovely and at 48 still wanted biological children but we didn't work out for other reasons. I also have childless friends in their 30s dating and again, find it difficult to actually meet someone who is keen to settle down. I also have a FWB who is 37 and so, so lovely but is more keen on drinking/doing drugs than settling down. He won't go on the apps, he's off the view if it's meant to be, it will. I just think for men of that age, they can still play and have fun and not worry about their biological clock.
Ultimately, what I am trying to say is if having kids is important to you than having a relationship, then choosing to have children while you are fertile is the only sensible option. I never set out to be a single mum so you could meet someone, have kids with them and still end up single in your 40s/50s (like me!). But you will have the kids you've always wanted. If you put having the perfect family unit above having kids, then you could jolly well end up with neither. And would you be happy to be in a relationship without children? These are all questions you need to ask yourself and answer honestly.
I know I speak from the priviledged position of having two beautiful children. And I have actually found dating in my position quite freeing. My children's Dad is involved. They are now 12 and 10 so I am no longer doing 'active parenting'. I have quite a lot of free time. I am not looking for a Dad for them. I am looking for someone who excites me and I can see a future with them. And dating is fun. My criteria is quite wide so I end up meeting lots of interesting people! And if I don't end up meeting someone, I have my FWB to fall back on at the moment. It's really not a bad position to be in. I feel if I get a good 10 years with someone, I will be happy. My life is fulfilled as it is! Just another viewpoint to consider... Best of luck!