For a sale to go ahead, the party seeking a sale would need to apply for a an 'order for sale' from the County Court. The other party would automatically be notified of the application.
Can the Land registry have anything to do with the sale of property?
Well you have to complete a TR1 form for Land registry.
All transferors need to execute it
oh yu are the one who wants to sell ( rather than you are afraid it will be sold above your head)
go thro the motions and then apply to a judge who will order a sale
these things costs money and it would be sensible for the non selling party to cave in and say - all right all right etc....