You are likely to find the answer to your question in our FAQs. 

If the answer is not there, please contact us by:

Email: info@swimathon.org 
Phone: 0845 36 700 36
Post: Open Water Swimathon, PO Box 4500, London W1A 7LF

*Calls cost up to 7p per minute plus your phone company's access charge 

Please note, office hours are from 9am to 5.30pm, Monday to Friday, excluding bank holidays.