Hi -- Normally when you come to live in the UK you only get 12 months maximum, in which to use an international licence before you have to exchange it for a UK provisional and take your UK driving test.
Therefore I do not think the IDP that you obtained in October 07 will be valid, because you have already been a resident in the UK for nearly two years and that entitlement has now expired.
In any event you would not be able to....or you would find it extemely difficult to obtain insurance in the UK using an IDP, as insurance companies usually insist that you hold a full UK licence before they will offer cover.
You would be best to concentrate on passing your driving test here, then applying for UK insurance as a new driver.