Downstairs loo is currently 3m by 2.4m. There is also a cloakroom (for coats) which is about 1m by 2.4m.
I think we would add value by turning the current loo into a study and then having a normal sized downstairs loo. There is also a small understairs cupboard so we could put coats there. Admittedly that's not as good as having a good sized cloakroom.
DH doesn't think its worth the hassle. Views please.