FWIW.
Years ago when I'd just got my GTI (2007 maybe?) I got nicked on the motorway by an unmarked car at 11pm (on my way to Canterbury from home). Got done for 103 in a 70. Summons came four months later. In the end I got 6 points and £300, was happy to have that. This was in my GTI.
Full story is probably still stored on uk-mkvs.net somewhere. But don't lose hope, and don't sell the GTI! Especially not such a nice blue one :) Trust me you can survive the three years with 6 points. My license was clean then for a while, but I picked up 3 in Nov 11 which again was quite reasonable - think it was 68 in a 50 (heading towards Reading). They were looking for drunk drivers I guess. Officer was a nice bloke, had a friendly chat, and gave me the roadside 3pts/£60. This time was in something faster than a GTI...
I nearly got nicked by the neighbourhood watch old folks with a laser gun this morning! In an electric car no less! Luckily someone flashed their lights at me and I slowed down just in time, gave a wave to the old fellow as I drove past (silently).