Nav/Ins Tuition

[Studying Again]

I have got to resit gen nav and instruments in November.
Does anybody know of anyone in the South East, preferably
around the Gatwick area that would undertake private tuition or do any schools offer extra tuition on a per subject basis.

Any info would be gratefully accepted. These are my last 2 exams and I am desparate to finish them so I can get on with the fun bit of flying.

Thanks.