There are a number of changes, although most take a keen eye. I assume the T plate car you saw wasn't a later one with a 'private' number plate, eg T5 ARR, or something similar.
Other differences of the top of my head are new front grille, new front headlight reflector colour, new exhaust pipe trims, curtain side airbags, brake assist, new instrument surround, E-Shift gearchange, gas filled dampers, etc although no panel changes. Hope this helps. The wiring from memory when someone else asked the same question was different so may cause a problem.
Nothing is impossible, although make sure someone qualified does it so you don't have problems like permanently lit bulb failure when you have forked out your money.
Best of luck