Janet - the financial argument is a red herring. There is never a "right" time to have a baby, but with £45k between you you are more than equipped to give a baby a good start in life.
I'm about to have a baby, and I'm only earning about half of your combined income, with no savings to fall back on. Yes, it will be tough at times, but babies don't care if their nursery is decked out in Mamas and Papas, or if they're pushed around in the latest Quinny. I've got every single item of baby stuff from ebay or from friends, and it's all in near-perfect condition. It CAN be done.
And on the abortion issue: I also had an abortion in my early 20s but I knew from the start that it was exactly the right thing to do, for me, at that time. That said, it was a very painful time (emotionally, not physically) and I have thought about that baby a lot over the last decade. This is despite the fact that I knew I could never keep that child, and I never wanted to.
I would therefore never, ever, advise anyone to have an abortion if they didn't want to. I can't help thinking that you would grow to resent your partner for putting you through that.
And, again, I think that if your partner loves you, and if he wants a future with you, he will make his decision and stand by you. If he doesn't then, frankly, he's not the man you thought he was.
As Secondsop says, will your relationship be one worth saving if he forces you to have an abortion against your will? You may want children in the future, but a "nice house in a nice area" isn't the be-all and end-all, and isn't something you can rely on and wait for.
There will never be a "perfect" time, even if you did abort this child and stay together, with a view to conceiving again a few years down the line.
Say you decide to buy a house, you'll be saving up for that for a few years. Then perhaps a wedding to save for, new jobs to think about, perhaps moving to different cities - before you know it, you could be 35 and with time rapidly running out, if you wait for him to decree that the time is "right."
I think he's scared and understandably so, but if you want this baby, you can't have an abortion on his say-so.