Doesn’t matter. Under English and Welsh law, all property and assets are matrimonial- houses, pensions, income, savings, investments, debt
part of divorce process is a legal obligation for full financial disclosure - uses forms E and D81 .
They need to agree then how to split (consent order). If they can’t they go to mediation. If that doesn’t work to court (financial settlement)
whatever they agree or don’t, has to be approved (sealed) by the court and they have a duty to ensure it follows the law (matrimonial act) in giving both parties “fair settlement “.
fair settlement is a list of 10 or so criteria and factors that have to be applied to the split of assets. The starting point is not 50:50 as many assume, but in most cases fair settlement comes out at roughly 50:50
if you go to top of this page you’ll see a MN to ADVICE NOW guides. They cost £20 or so to download. There is one on DIY financial settlement, it is a bit misleading title as it explains process around fair settlement and then the process around obtaining financial settlements. It explains what they need solicitor for, what they don’t, and what they might. There are other guides that are great too on other aspects of divorce process.
yes, they cost, but a solicitor will cost £200+ per hour to get the same information
send him link, or download guides and gift them to him - that’ll help him understand what he can expect out of a financial settlement based on fair settlement and how to get it.