We have LARS units that want to talk to people for far too many miles away from their ATZ (Farnborough)
Really?
In my experience it's the aircraft who are calling up/staying with Farnborough LARS outside their operational area.
How far do you think the Farnborough LARS sectors should stretch?
I assume you're aware that their sectors run from west of CPT, down to GWC, over to SFD, up to DET, northeast of BKY and then just south of WCO, and the reasons behind that coverage which have nothing to do with the EGLF ATZ.