can I register a new lease when there is already another current lease registered

lease registered which expires July 27.
Deed of surrender was completed in 2020 by leaseholder and freeholder but land registry not updated
To remove this now everywhere says that I need to submit with form ID1 which the former leaseholder wont do as she is very ill and doesnt want to.
I have a buyer for a new lease -is there any way that this new lease could be registered or the old one removed..
If it cant be done I will have to cancel the sale and wait until 2027 which is not great but better to get the facts now rather than months down the line

Claire - If you seek to register a new lease then the 'old one' will need to be dealt with/considered in some way. I imagine the buyer would want that resolved as well.
If the surrender is by way of a deed and fits our PG 67 section 4 guidance then we will need the identity verified. I'd suggest speaking to a conveyancer or seeing if the other party will consider having her identity verified using form ID3 as an alternative for example
Practice guide 67: evidence of identity - GOV.UK (www.gov.uk)