I am not sure how much standard tracking will be these days as it has been quite awhile since I had it done, but expect to pay between £15 and £30, I much prefer to have a full four wheel geometry alignment done.
This is expensive and can cost anywhere between £50 and £180 depending on where you go. I also had the beast corner weighted as part of the alignment works. I personally use a place called Elite Direct who are based in Rainham in Essex.
They know my suspension on the car inside out, and are quite capable of tuning for factory road handling, fast road and all out track.
This will be very far for you to travel under the circumstances but I can recommend them very highly.
If you are lucky PP, Kwik-Fit sometimes throw a tracking in for free if you spend enough on the tyres.