Withdrawal of application

On the 5th March we were due to exchange, however it was found out that a bridging loan was taken out for the property at the top of the chain. An application was made to the land registry to update and reflect this but the vendor subsequently repaid the loan. An application withdrawal was then made and expedited. Can you advise as to how much longer this will take to process please? I appreciate the land registry must be busy but the impending stamp duty change is going to cost the entire chain quite a lot extra and this is the only thing holding us up now.
I'd really appreciate some advise at this point, please.

Kerrie - if they requested cancellation of their application then that's usually done within 24/48 hrs