I AM indebted to A V Martin for reminding me of the crisps and twist of salt that were purchased in our shared school tuck shop, affectionately known as ‘The Bun Room’ (“Walkers must solve an age old problem”, Letters, August 13).

He is perhaps not a member of the RSPB, whose latest quarterly magazine was dispatched in a wrapper said to be made of compostable potato starch. Walkers crisps take note.

Graeme Robertson,

Tadcaster Road, York