Not sure if the mk2 is the same as the mk1, but on the mk1 the chassis number is also stamped onto the bodywork by the offside (drivers) front suspension strut.
Lift the bonnet and have look for a long series of numbers/ letters stamped onto the inner wing by the strut tower. If you find it, then that is your chassis number.
Problem is, the towers can sometimes rust and get plated over or replaced to get through the MOT as they are of structural importance. If that has happend then the numbers might have disappeared altogether.
Hope this helps!
Chas