Good Afternoon Ali - I'm sorry to read of your recent loss
Our PG 1 explains what's required when making an application for first registration. Which land charges are required is explained in section 4.4.5 -
First registrations (PG1) - GOV.UK
You'll see from the guidance that you need searches completed for both parents and personal reps
It is a postal only application so not one you can hand deliver.
And we don't verify identities but please refer to PG 67 with regards when you need to have your identities verified using form ID1 or ID3 as appropriate -
Evidence of identity (PG67) - GOV.UK