Wanted: Would-be father to co-parent a child

Pretty, soulful, happy and healthy woman, (single and heterosexual) would like to meet a man prepared to father a child and to have a role in the child's life. London-based. Terms of relationship to be negotiated.

I've been looking for a partner - more a soul mate, really - for ages. But the right person hasn't come my way. Then, about one year ago - profoundly, peacefully but really clearly - a thought came to me: 'I want a child.'

Still, more than anything though, I'd like to have a child with a partner. I don't know why the right person hasn't turned up, but he hasn't. So I've decided to look for a co-parent. It's not an ideal solution but it's better than the other options. But how to make it happen? I've wondered where I can place an ad.
So I’m trying this.

What sort of man am I looking for?
I envisage a co-parent being middle class, professional and with values similar to mine. Age and ethnic origin aren't important. Physical characteristics don't matter that much, although obviously I'd prefer an attractive father for my child. In fact, the only thing that really matters is shared values. Whether he's gay, straight or in another relationship is irrelevant. I just want someone who's willing to be a father and co-parent. I'd also like him to offer some financial support (financial support for the child, not necessarily for me).

Whilst physical characteristics are not too important, I would like him to have a good IQ to maximise the child’s chances of being intelligent.

I’d like a man who will be emotionally present and play an active role.

So I hope I'll get some responses to this profile, including an explanation of why you want to co-parent. Anything will do - just to give me an idea. I'll contact those who interest me and meet up with them. I don't know how I'll test the person's suitability to be a parent, beyond sensing it.

I’d screen for HIV and STDs.