SIR – Before you next go to throw away an envelope which has a postage stamp attached, think that by simply saving that stamp you could be helping a person who has kidney failure.

At the British Kidney Patient Association we need your used postage stamps, foreign coins and notes, old British 5p/10p pieces, old British notes, etc. All these items are one of the many ways in which we endeavour to raise much-needed funds.

So pleasesave your stamps and all other items listed and send them to us at the address below without delay. Thank you.

Mary Jordan, charity administrator, British Kidney Patient Association, 3 The Windmills, Turk Street, Alton, Hampshire GU34 1EF