SIR - It must be recalled that at one time only 10per cent of all grades awarded at A level were at grade A as opposed to 45per cent today.

It is quite clearly the case that the criterion for deciding marks has changed drastically over the previous 40 to 50 years.

At one time a grade A was given for demonstrable quality and both employers and universities had confidence in the grades awarded. Unfortunately the same does not apply today, an obvious consequence of grade inflation.

Alec Suchi, Allerton Road, Bradford