wether his tyres were underflated or not is subject to different interpretation.
the wording of the law will need to be consulted to see if they can do someone for it and issue 3 points.
http://www.direct.gov.uk/en/Motoring...ns/DG_10022425
see it shows the offence to be "Using a vehicle with defective tyre(s)". now is a tyre underinflated defective per se?? physically it is not defective but does the definition for legal purposes show that "defective" has to include aspects as air in the tyre??
you need a solicitor if you want to win that one!