Will try and give as much info as possible, I know the answer is to get a solicitor involved but no one has any spare funds for that right now.
MIL is in a care home with dementia, she is still technically married, but they have been separated for nearly 10 years. Both MIL and not quite exDH have moved on with other partners. MIL has no assets, she has a pension worth about £80k but she's only 62 so not currently drawing her pension. MILs current partner, DH and BIL are all deputies for MIL appointed by the court of protection. We have been unable to locate a Will and think it's unlikely that there is one. There are 4 beneficiaries listed with the Will company (BIL only managed to update the Will company with this info this week) these are MILs partner, DH and 2 BILs.
So my questions are. as MIL is still married and without complete certainty around a Will, what are the chances that not quite ex DH could claim the pension when MIL passes away? Also, is there anyway to find out if a Will exists whilst MIL is still alive (if there is one we have no idea where it is or where it would be). MILs ex is an awful person and we wouldn't put it past him to fight for some money if there is any, even though they have been separated for so long.
Happy to provide more info if needed.