Death of Two Tenant in Common

Two brothers own a property and both passed away within months of each other.

They passed their estate to their wives. Two set of probate need to processed by different executors 

Can you process the transfer of deed for one party at at time or so you need both probate to complete deed title transfer?

Also what forms need to be completed to transfer the titles

Amna - when a joint owner dies, irrespective of whether they are joint tenants or TIC, the legal ownership passes to the surviving owner to deal with. The legal ownership does not form part of the estate of the deceased so probate is not required with regards the property.
If the surviving joint owner also dies then probate for them is then needed and it is their executor(s) who then deal with the property 
Our online assisted guidance explains what is required to then transfer the legal ownership as appropriate
HMLR Guide: Start - External  · HM Land Registry