Emz26's post is incorrect on two counts:
Firstly, during the first two years after passing your test, a licence is automatically revoked when you
reach 6 points,
not when you
exceed 6 points.
Secondly, your licence does not revert to provisional status. It is completely revoked and you have to apply for (and pay for) a new provisional licence (in the same way that you did prior to learning to drive).
If you acquire 6 points on your licence, there is no right of appeal against the
revocation of the licence. This is an automatic process. However, you can appeal against the
conviction (or fixed penalty) which led to the points being put on the licence.
So, if you had insurance, you only need to produce evidence of this fact to remove the points and cancel the revocation of the licence. However, if 6 points are put on your licence as the result of one or more genuine driving offences, there's nothing you can do about it:
http://www.direct.gov.uk/en/Motoring/LearnerAn dNewDrivers/NewlyQualifiedDrivers/DG_4022566
Chris