Jam Yesterday, Jam Tomorrow volunteer and local historian David Lawrie (left) is greeted at Squire's Garden Centre, Twickenham, by Colin Squire. Chairman of the company, on the day of installing the "Feeding London" exhibition that celebrates market garden history in Middlesex. Squire's was founded more than 75 years ago and over the years it has adapted to changing needs, including vegetable production during the war years 1939-45.