Barking, Ilford South, Romford, Hornchurch, Walthamstow, West Ham and East Ham are all in the lowest-achieving group of London seats.

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Della Callagher died two days after eating at the Railway Hotel in Hornchurch where 30 other people also became ill.

BBC: Husband's complaint after suspected food poisoning death

Dean Wells, 22, of Isleworth, west London, was jailed for 12 months, David Mitchell, 19, of Littlehampton, West Sussex, was sentenced to seven months and Andrew Hudson, 26, of Hornchurch, Essex, was given an eight-month jail term.

BBC: EDL member jailed for Liverpool Street football brawl