Three (primarily domestic races).
Linked to the Pattern are Listed races, which are a level below Group Three in terms of importance.
The Pattern can be altered from season to season to allow for races to upgraded or downgraded where it is deemed appropriate.
For example, in 2003, the Queen Anne Stakes at Royal Ascot has been promoted to a Group One race.
British Group One races in 2003
2,000 Guineas (1m, Newmarket, May)
1,000 Guineas (1m, Newmarket, May)
Lockinge (1m, Newbury, May)
Coronation Cup (1m 4f, Epsom, June)
Oaks (1m 4f, Epsom, June)
Derby (1m 4f, Epsom, June)
St James' Palace (1m, Royal Ascot, June)
Queen Anne (1m, Royal Ascot)
Prince of Wales (1m 2f, Royal Ascot, June)
Gold Cup (2m 4f, Royal Ascot, June)
Coronation Stakes (1m, Royal Ascot, June)
Golden Jubilee (6f, Royal Ascot, June)
Eclipse (1m 2f, Sandown, July)
July Cup (6f, Newmarket, July)
KG VI & QE Diamond Stakes (1m 4f, Ascot, July)
Sussex Stakes(1m, Goodwood, August)
Nassau (1m, Goodwood, August)
International (1m 2f, York, August)
Yorkshire Oaks (1m 4f, York, August)
Nunthorpe (5f, York, August)
Sprint Cup (6f, Haydock, September)
St Leger (1m 6f, Doncaster, September)
Fillies' Mile (1m, Ascot, September)
Queen Elizabeth II (1m, Ascot, September)
Cheveley Park (6f, Newmarket, September)
Middle Park (6f, Newmarket, September)
Dewhurst (7f, Newmarket, October)
Champion Stakes (1m 2f, Newmarket, October)
Racing Post Trophy (1m, Doncaster, October)