Read an article in a newspaper last week....it went something like this.

Man insured with tesco insurance.
Man has a prang in a tesco car park
Man phones tesco insurance to inform them of the incident
Tesco insurance inform man he is not covered whilst on tesco property!!!

I am insured with Sainsburys.........Think I will read my policy.

It would appear that Tesco have now changed their minds regarding this matter

http://www.ananova.com/business/story/sm_864640.html?menu=