Charter Party (horse) previous year's winner West Tip. On his final appearance of the season he carried top weight to victory in the Golden Miller Chase at Cheltenham in April. Richard Dunwoody took over as Charter Party's regular jockey in the 1986/7 National Hunt season. The campaign was not a successful one, as the gelding failed to win in six races. He finished fourth on his debut at Wincanton, was pulled up in the Hennessy Gold Cup and ran third in under top-weight in the Mandarin Chase. He fell in the Gainsborough Chase at Sandown (won by Desert Orchid) and was beaten when
1990 Grand National Festival three weeks earlier and in addition had been given the minimum 10 stone to carry by jockey Richard Dunwoody, albeit the Ulsterman weighed out 2 lbs overweight. In the race itself Bigsun turned for the second circuit in the main pack but was always trailing the leaders without ever getting into a challenging position. His finishing position of sixth was as close as he was at any point of the race. Rinus came to Aintree having won the Greenall Whitley Gold Cup at Haydock Park in February under Richard Dunwoody but with the Ulsterman opting to ride Bigsun, the