No title deeds, property purchased 1969

Hi,

My mother died earlier this year, and after searching for it the title deeds seem to be disposed of.  She bought the house in 1969 (with my father), from what I have told outright and not on a mortgage.

I have been looking on the website and forms to apply for this, but it seems a tad confusing.  Form FR seems unneccessarily complicated, e.g. section 9 - both me and my brother are on the probate, so I would assume that we would both apply for the title (in order to sell the house), yet this section mentions about being tenants or holding the property in trust. 

I am loathe to get a solicitor when something can be done easily by oneself, e.g. did the probate no problem.

I do know that the house if leasehold (as she paid ground rent), but I think the details of whom she paid it to have also been disposed of.

Hi Stephen - PG 2 explains how to apply for first registration when the deeds have been lost - First registration of title if deeds are lost or destroyed (PG2) - GOV.UK 
You'll need to decide if you are going to apply to register yourselves as beneficiaries or as executors. Our online guidance will help re what's needed depending on what you decide to do - HMLR Guide: Start - External  · HM Land Registry 

Land registration is complex, designed to protect legal and financial interests in property. There can be significant consequences for any error. Please consider seeking legal representation. Before making an application without legal representation, it is important to consider the benefits of using a conveyancer.