Just looked at Tesco's policy and it says
<!--quoteo-->QUOTE<!--quotec-->Exclusions
We will not pay for any liability for loss or damage to property, or death or bodily injury arising from:
-your deliberate act or omission
-the employment, business or profession of you or a member of your family
-your ownership, care, custody or control of any animal
-an agreement unless the liability would have existed otherwise
-your family or an employee of you or your family
-the occupation of land or buildings by you other than your temporary journey accommodation
-ownership or use of any aircraft, horse-drawn, waterborne, motorised, mechanically propelled or towed vehicle or of any firearm.<!--QuoteEnd--><!--QuoteEEnd-->
That last one looks like you're not covered for anything relating to a motorbike