When I contacted them to inform them I would be leaving the scheme as I was getting a car off the scheme. I was told how much GCB I would receive beforehand and was no surprise at all.
1 year £250 and 2 years £400
Gave my scheme car back after having it just under 2 years as the new car arrived and got £250 GCB.
Although I did also get a little over 1/3 of the advance payment back I had made and that worked out differently was on a monthly basis.
had I waited for the 2 years to be up I would of got less ap back pro rata so all in all for me it’s was not an issue at all and something I knew before handing the car back.