Listen, you fucked up pathetic drain on the world's resources, there are good reasons why you don't see either of your daughters. And it's not because either I or your other daughter's father "stole them away from you", or whatever you try to tell people.
Instead of occasionally doing the "poor me" thing about what a fuck up you are, how about you actually seek some help and maybe, just maybe, you could become some kind of a mother to them?
But no. That wouldn't really fit with the world you have created, would it? And it would be an act of enlightened self-interest. I know you understand self-interest, but sadly I know you cannot understand making a long-term commitment to consistently do something positive for yourself to create a better future. Otherwise, you might still be having contact with our daughter.
And while we're about it, how about you chuck a few quid towards your daughter's upbringing? No, what you spend on her while your with her does not count. No, I did not want to go to the CSA. £20 over the last two years? I'm pretty sure I wouldn't want to touch the money you got / get for your cash in hand work, but you did have a proper job for a while.
Finally - just fuck off. Your daughter doesn't need you half-arsed commitment, doesn't need you thinking she's stupid because she has a speech delay, and definitely doesn't need you treating her like she's an accessory you can enjoy as and when you want to. She's happier, more stable and progressing faster without you in her life than she ever did when you had contact.