Sir – Would it be a good idea to plant trees in all our car parks? It is sad that the first sight of Oxford as you come by train from London is a sea of cars — your next another in front of Nuffield College. Locked cars can get unbearably hot unshielded.

Our marvellous botanic garden experts could give excellent advice as to which trees would be most suitable and give most shade.

I would be very happy to fund the first tree and I am sure other Oxford citizens would be glad to join in.

Moyra Bannister (Lady), Oxford