I WAS dismayed when I read Derek Martin’s letter (The Press, April 30) about HRH Prince Charles.

Comparing him with Diana was very unfair as anyone who has benefitted from his Prince’s Trust will affirm.

They both contributed to the less fortunate in their own ways.

Criticising Camilla also caused me concern as she has never put a foot wrong in supporting Prince Charles.

Frankly, I was astonished that the thoughts of Mr Martin were even given an airing in the paper.

It brought to mind the saying: “People in glasshouses should never throw stones.”

Barbara Saville, Askham Bryan, York