just checked it out through quidco (quidco cash too-cant remember how much now) and they are doing 100 of jjb gift vouchers if you apply before 29th june! terms and conditions are:
If you cancel your policy within the first year, PruHealth may request a refund equal to the value of the voucher (currently £100).
Only available to first time applicants.
Only one incentive per policy.
Vouchers will be issued 30 days after the activation of the policy. Allow 14 days for delivery.
Only available to customers who purchase their policy through http://www.pruhealth.co.uk.
Offer currently ends 29.06.07. PruHealth reserve the right to amend or withdraw this offer at any time.
JJB own terms and conditions will apply with the redemption of the vouchers.