Leasehold - responsibility for windows?

bloomers

I live in a ground floor flat with share of freehold. When I moved into the flat three years ago, the two flats above were owned by one resident, and we had a spoken agreement that we would share costs of repairs to the building, except for windows which would be repaired (and paid for) by the owners of the individual flats. That worked very successfully.

Now the previous owner is no longer around, and the two upstairs flats are being sold to two separate purchasers. Their solicitor has asked me to sign the docs for transfer of freehold, which is fine, but when I mentioned the situation with the repairs to windows, he said we'd have to follow what was written in the lease.

Well, I can't understand legalese at the best of times and I just can't see anything specifically about windows in the lease (apart from the glass in windows, which is the responsibility of each flat, not the freeholder). Anyone know if there's a standard for leaseholds? That the freeholder is responsible for repairs to window frames, or the leaseholder? Any help appreciated.

PD1

If there's no mention of windows anywhere, I'd assume that like the glass its the individual owners responsibility, which is what I think it should be really. On a personal level, I'd never be lumped in with other owners over repairs to something like windows, especially if I lived on the ground floor(possible scaffold costs).