MUSSELBURGH TO RACE ON SATURDAY Following the abandonment today of Hamilton Park`s meeting the British Horseracing Board has agreed to stage an additional Flat fixture at Musselburgh on Saturday. Details of races will be issued tomorrow and will close on Thursday. Hamilton Park`s first meeting of the season was abandoned on safety grounds.Parts of the final furlong are still waterlogged resulting in some false patches of ground.Inspector of courses Ron Barry could not pass the circuit fit and gave the track no prospect of being raceable by Saturday.Thursday`s meeting at Leicester has also been abandoned as the course is waterlogged.