I think the suggestion is that you each provide details of properties you think would be suitable for the other - I assume so that each of you can see what the other is suggesting.
I would expect that you will each then have the opportunity to comment on and discuss these, so that if (for instance) all the propertuies he suggests for you are in a very dodgy area, or a long way from your daughter's school, you can explian why they wouldn't be suitable, and vice versa.
On the face of it, you have a total of around £287K so if you are offering him £95K you would retain £183K - is that on the basis that you could then rehouse mortgage free? I think a court would be likely to say it was reasonable for you to both have mortgages, given that you have similar incomes, and similar housing needs. (It's reasonable for him to want somewhere which is bg enough to have contact there)
Although it is a priority to ensure you and your (minor) daughter have a secure home, that does not automatically mean that you get to keep the house you are currently living in, as the split has to be fair to both of you. The issue is more one of how much you will need in order to suitably rehouse your self and your daughter, subject to an affordable mortgage.
Ber in mind that as you have a higher income (around £1590 net as against his £1300 net per month, which with maintenace for your daugfhter could resukt in you having around £1700 and him around £1100) you will have greater mortgage capacity, so on an equal split the liklihood is that you will (if you wish) be able to afford a larger property.
A 50/50 split would give you about £143,500 each, (or £137K to him and £150K to you, if you had £13K to 'match' the endowment policy) - so one issue is likely to be to consider what you might be able to buy with that amount + a mortgage based on your mortgage capacity, and to then adjust
if that would not give you enough to rehouse.
As your elder daughter is 25 she would be seen as an independent adult so her housing needs would not normally be taken into acount.
It's not so much about his being able to live where he wants, as about you both having a fair share of the available equity, subject to you being able to rehouse yourself and your daughter.
So far as pensions are concerned, it sounds as though he is suggesting an earmarking order - i.e that you would get a share of his pension when he retires.
This has the disadvantage that you don't control when the money is paid, as it is tied to his retirement, not yours, and it would end on his death. (It does potentially have the advantage that you might benefit from further payments he makes into his pension)
You can instead ask for a
pension sharing order, so that some of his pension is transferred to you. You would then have this as a pension in your own right, compltely separate from his fund, so it would be payable on
your retirement, not his.
Depending on what type of pension it is you may need to get specialist advice about what the % split ought to be, to give you equal income in retirement.