The contacts for each team, including the relevant AFL London club, are:

Carshalton Boys Sports College
School contact: This e-mail address is being protected from spam bots, you need JavaScript enabled to view it
AFL London club: Wimbledon Hawks
AFL London club contact: Dan Gale 

London Nautical School
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AFL London club: Wandsworth Demons
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Hackney Free & Parochial School
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AFL London club: Sussex Swans
AFL London club contact: Ben Gellie

Featherstone High School
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AFL London club: West London Wildcats
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Winston Churchill School
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AFL London club: Putney Magpies
AFL London club contact: Michael Mullins