Hi -- Below is an extract from the rehabilitation of offenders act which states once considered spent after 5 years from conviction date, that for insurance purposes you are not obliged to declare it, even though they can take up to 11 years before you can remove them from your licence.
I don't know what the disqualification was for but providing you fit this condition, then they cannot invalidate your claim based on the above grounds only.
http://www.lawontheweb.co.uk/rehabact.htm
...................... ......................
If the proposal form asks whether the applicant has any previous convictions, the answer can be 'no' if the convictions are spent. This is the case even if the conviction is relevant to the risk which the insurers will underwrite. (For example, spent motoring convictions are not required on a proposal form for motor insurance.)