There should be no need to employ a solicitor. Things might be simplified if your father left a will (and this has now been 'proved') but even without a will, it should still be possible to deal with the matter yourself.
Your first step should be to ascertain the contact details for the relevant office of the Land Registry. You can do that from the list here:
http://www.landreg.gov.uk/regional/areas/defau lt.asp
(Note that, if you live outside of a metropolitan area, you should look for the name of your district council, not the county council).
The Land Registry staff will be able to offer you guidance on their procedures.
Chris