I've posted this in Property too but wasn't sure if I'd get more replies here!
I am currently selling my leasehold house and we are approximately 2 weeks away from exchange.
My buyer has been in touch with me today - her solicitor has advised her that the lease does not contain a clause that she may want to have put in (the freeholders have agreed to this being added). There is a cost to both her and me but I'm happy to pay if it means she doesn't pull out.
What concerns me is how long this deed of variation can take - does anyone know? I'm guessing it won't be sorted in time to exchange in 2 weeks!