POW? Partner of Wife? Prisoner of War? Parents of Wife?
If the parents are still alive and well, then a potential inheritance isn't a certainty - people can and do change thier Wills later on, even at the very last minute. It would be difficult for you to argue that a potential future inheritance that isn't guaranteed should be considered when sorting out the marital finances and needs of the parties.
If the inheritance is due shortly because the benefactor is deceased, then you may have a stronger case for arguing that it is taken into account.
Maybe it was profit from a building project that they have gifted to her?
Is it related in anyway to the £50k your ex lent her parents?
If it is money that her parents have given her with no strings attached then it is a gift and looks to have been properly declared.
This may be as part of their inheritance planning but to inherit something someone has to die.
What you usually find in these situations is that the parents gift money to their child during the marriage and then suddenly upon divorce it turns out it wasn't a gift at all! It was a \"loan\" which must be repaid. At least their not trying that, although Courts are never interested anyway.
The complication arises that the original £65k that was loaned to POW for the build project was in turn spent on a refurbishment project of another property owned by POW. Thus as this stage a beneficial interest is created and held by both parties for the 2nd property owned by POW.
The W failed to disclose this beneficial interest and / or disclose the substantial financial detriment suffered by both parties. where H had no control or access of the original marital funds.
The agreement was between W & POW to loan back the 50k, and H was told he has no claim to the return of such funds as they were \"gifted\" from W's \"inheritance\" funds.