Gbp

[Cyberman]

Do they own a property with equity ? If they do then they can consider equity release as my parents have done, although of course it will not help your inheritance.

[ASB]

Since you are in the process of buying a house why not borrow some of the money from the parents and pay them what you would pay in Mortgage payments?

[denver2k]

should they move their money into something else, such as gold for example?

Buy Chinese Yuan

On Serious note...Diversification in investment is the way forward.

Reduce the exposure in GBP. Gold and other good old commodities are lot better than speculattive equities,fockd up bonds and valueless paper currency(backed by debt driven economy).