I AM writing to thank all the dedicated Action on Addiction supporters who ran 26 miles in this year's Flora London Marathon to raise money for our vital addiction research programme.

Action on Addiction is the only UK charity that relies entirely on voluntary funding and support to carry out its research into the causes of drug, alcohol and nicotine addiction.

Thanks again to all our runners who have raised over £20,000 for Action on Addiction.

LESLEY KING-LEWIS

Action on Addiction

Lawn Lane

London