The department of transport have a survey running at the moment (till the 24th) on weather to abolish mot's on pre 84 cars. if this go's ahead there will be other implications further down the line like limited mileage and talk of having to have premits/pre book to drive your classic on the road. make your voice heard as once they change the rules there's no going back.
http://www.dft.gov.uk/classic-mot/
http://www.dft.gov.uk/classic-mot/