Sir - Having just returned from a hugely successful 'OxClean Womble' with the Summertown Wombles from Summer Fields School, could I recommend the use of Porta-Womble-Bins to collect litter on playing fields.

On the playing fields that border the Marston Ferry Road there was a huge amount of litter that must be spectator-generated.

What is not blown away into hedgerows surely has to be picked up before pitches can be mown again. So it would surely save groundsmen's time to have porta-bins.

Rev W. L. Pryor, Great Uncle Bulgaria to the Summertown Wombles from Summer Fields, Oxford