@Anna Log and Frank
Anna: If you're going to put on the scientific specs then I must correct you.
"using triangulation to estimate location". Strictly speaking, that is incorrect. Triangulation is done by measuring angles (eg. off radio direction finder kit). Since cellular positioning is done by measuring propagation time (ie. distance), just the same as GPS, the correct term is trilateration.
If you're in a position that is too poxy to give a GPS fix then I wager you won't get enough healthy cell signals to get a cellular fix either.
Frank: I doubt very much that any such ruling would force you to ditch a much loved phone. The ruling would tend to impact what can be sold, not what can be owned and operated. But then... UK lawmakers have been a bit draconian recently.