Sorry OP I haven't read all the previous replies to you, but I have read all of yours. The breakdown of my first marriage happened 30 odd years ago, I had 3 children including one baby, I was in my early 30's. The laws may have changed radically since those days, but my solicitor recommended I went for a larger share of the house, and more maintenance for the children with none for me, and none of his pension rights. Why? Because at the age I was then, I was very likely to get married again, and on doing so I would lose my individual maintenance, and any entitlement to his pension.
I followed her advice, I was given the whole house (not that much monetary worth as we had literally just moved in when he told me he was leaving me for TOW, and we had a very large mortgage), as I had 3 children under 10 years old. I was a SAHM so at that time the DHSS paid my interest only mortgage for me, and were willing to do so until the youngest child left secondary school education. My ex was made to give me just over £150 per month per child until each child was 18. I got married 4 years later, and moved into my new husbands bigger house with the children, and sold my house. That meant I did have to pay the legal aid back, and I hadn't accrued much equity in the house, but my lovely Dad paid the £8000 legal aid bill for me, so I was very lucky in that respect. My ex had to continue paying the full children's maintenance for another 6 years, then for 2 of the children for another 3 years, than the youngest one for another 5 years. However he went bankrupt about 1½ years before our last child's maintenance period was up. I didn't try to get the extra 1½ years maintenance off him as I felt quite sorry for him. I never hated him, I never made it difficult for him to have his time with the children. I have never been well off financially, but we were ok.
Like I said, I am sure the rules for a lot of things have changed over the years, but if you think the likelihood of you getting married again is quite high, please get advice on a better way to receive your share of things, without going for his pension. Also, if you can get legal aid, remember it might need paying back at some stage. Good Luck OP