Longer front link for sure
. I run a long front link almost always - only going to a shorter one in the wet and slippery.
Also - 2mm under the link on the rear tower is a good move - but I do run the rear link short - with the outer in either the E position or the B - with 2 or 3mm under the ball stud at the wheel.
If you're running Schumacher minispike tyres - cutting an outer row off the rear will help reduce traction roll without affecting forward drive noticeably.
The other thing would be that the kit front spring is (IMO) far too soft for UK style high-bite tracks. I would recommend swapping this out for a green front spring to begin with - if your traction roll is induce by the front end being too soft (spring along with short front link), changing both of these might well get you a long way towards sorting the car initially for you.
HTH