Fishing is free anywhere along the tidal Thames from Teddington Lock to the sea. Catch freshwater and sea fish, ranging from roach, pike and perch to bream and flounder. Choose your spot carefully and watch the tide. A friend of mine is a passionate angler, and swears Thames carp fishing is some of the best to be had anywhere. You'll need a rod and line licence, available online or through the post office.
www.environment-agency.gov.uk/homeandleisure/recreation/fishing/
Licence: 1 day £3.75 (or £8 for salmon and sea trout)
Google map: bit.ly/OnukwR