Millions of car insurance customers will put their lives at risk this bank holiday weekend by not checking their tyres. Research by Micheldever Tyre Services, a leading supplier of tyres and experts in automotive care, found that more than 30% of the cars owned by motor insurance policyholders that are brought into its flagship outlet in Hampshire have at least one illegal tyre. A year ago, only 19% of cars had one or more un-roadworthy tyres. More than 80% of the cars brought in also have badly worn tyres with a tread depth below 2mm, which urgently need replacing. Car insurance customers who drive with tyres that are not roadworthy not only risk causing accidents, which could harm themselves or others, but could also incur a fine and penalty points on their licence, which would result in higher motor insurance premiums. There are more than 31 million cars registered in the UK and these figures from Micheldever suggest that around 1.5 million car insurance customers could be flouting the law with illegal tyre treads.