Voluntary first land registration application search

I am about to make a voluntary first land registration for my house. In the "Registering land or property for the first time" guidance notes item 2 states "Apply for a search from the Land Charges Department to search against all previous owners since 1925. They will send you the results."
Which form do I submit for this search?

B Reeves - see PG 63 section 3
The land charges registers and agricultural credits register: registration, official search, office copy and cancellation (PG63) - GOV.UK