If you are an insulin user or on a glucose lowering drug and the meter was given to you by the practice then they can REQUEST you change, they cannot force you to do so......if on the other hand you were given the meter by the hospital clinic you can tell the clinic and ask them to write to the gp to leave your meter alone.
My GP's practice manager has tried to do this to me a few times, but I have explained to them that I have to trust my meter implicitly as I inject myself with what is to others a deadly poison several times a day.......it takes a long time to gain this kind of trust in a meter and shouldn't be ignored .............though the members here who use the Tee2+ meters say its a good one.