Another thing is that you are comparing a further 2 year lease extension with going private on a new car and not a 3+ year old car (which is what you’re paying for on your extension), easy enough if you have the funds to beat the scheme on a used vehicle, I have done just that 4 months ago and got a vehicle that was never on the scheme because it was too high a spec to make it on the scheme.
Glad I did it when I did looking at the list this morning.