Sir – I’d like to thank all those volunteers and organisations who like me and my office staff, helped with this month’s Spring Clean of Oxford. In particular, the OxClean organisers and Oxford Civic Society deserve congratulations for organising a successful litter-picking operation.

Thanks are also due to the city council for their co-operation. The amount of long-standing litter on the ring road and roundabouts is a real on-going concern and I hope it will be possible for the local authorities and the Highways Agency to provide a regular and effective cleansing on those parts of our city that first greet arriving visitors.

Dr Evan Harris MP, (Lib Dem, Oxford West and Abingdon)