[1][2][3] He was the son of Lieutenant-Colonel Douglas Forster, who as a racehorse owner had won the Wokingham Stakes at Ascot in 1957 with Light Harvest.

[2][3] In 1957, Forster travelled from the 11th Hussars barracks in Carlisle, Cumbria to ride a winner at the Vale of the White Horse ("VWH") Hunt's point-to-point meeting at Siddington, Gloucestershire.

[3] By August 1962 he became a Licensed Trainer and just a year later he moved from his original yard at Kingston Lisle, in Oxfordshire where he had a few boxes owned by a farmer friend, Colin Nash.

[5] When trainer Tom Yates retired due to ill health,[5] he took over the stables at the Old Manor House in Letcombe Bassett near Lambourn in Berkshire.

[2][3][5] Just one year later in 1963, Forster celebrated his first winner at the Cheltenham Festival in the United Hunts Challenge Cup with Baulking Green.

[8] When Well To Do won the Grand National, Forster became the first trainer and owner to win the race since the World War II.

[10] A year later in the 1980 Grand National Ben Nevis II, ridden by Charlie Fenwick Jnr,[13] broke clear of the field to win by twenty lengths.

[3] Last Suspect won by 11⁄2 lengths in front of Mr Snugfit and the 1983 Grand National winner Corbiere coming in third.

[5][15] Forster retired with a full training licence in 1998 and ended winning his last race, a novice chase at Market Rasen on 30 May 1998 with Albermarle.

[3] Forster received an Order of the British Empire ("OBE") in the 1999 New Year Honours List for services to Horse Racing, which were announced on 31 December 1998.