A full programme of racing is expected to take place tomorrow in Britain as the sport battles to keep going in the face of the current fuel crisis.
But Catterick report that their meeting on Saturday could be under threat due to lack of ambulance cover.
Today`s meeting at Pontefract was abandoned because the Tees East and North Yorks Ambulance Service could not attend the meeting.
And Catterick is served by the same service who are still experiencing problems receiving fuel.
Clerk of the course John Gundill explained: 'Basically I still have concerns as the ambulance providers have not yet received their promised supplies of fuel and they cannot guarantee that they will be able to come to Catterick on Saturday.
'But the position will be reassessed tomorrow.'
Racing will take place at Ayr, Newbury and Nottingham tomorrow, with all three courses receiving assurances that essential medical cover will be available.
However, Nottingham came close to being lost.
Prospects of racing at the Colwick Park track had looked bleak this morning as it seemed unlikely that an ambulance service would be available.
However, following a meeting this lunchtime, the authorities were able to tell Nottingham that ambulances would be on duty.
Clerk of the course Charlie Moore explained: 'We fully expected the worst news from East Midlands Ambulance Service after their lunchtime meeting.
'The news at 11.30am was not good and we even produced the abandonment certificate.
'This is great news and we are now on for the meeting.
'The racecourse has offered to provide fuel to the ambulance service who are now able to release ambulances as they have obtained fuel for other vehicles.'
Newbury are very hopeful that their two-day fixture starting tomorrow will go ahead as planned despite the current fuel crisis.
Marketing manager Lisa Ward said today: 'Our main concern has been the availability of the emergency services, but we are very fortunate that the ambulance and police stations are located just a quarter of a mile away and are able to cover the two-day fixture.
'We appreciate that some racegoers may be deterred from travelling by car because of the fuel crisis.
'However, Thames Trains are adding extra carriages to their Newbury-bound services and are considering the possibility of running extra trains.
'Our sponsors and the British Horseracing Board have been extremely supportive and have given us a great deal of encouragement and we are ready to race.'
Ayr has been given a helping hand by two other racecourses to cope with a glut of horses due to race at the three-day Western Meeting.
Carlisle and Hamilton are offering accommodation as the 190 boxes at Ayr are not enough to cope with all the horses.
'With the fuel problems many trainers are bringing up all their runners at one go. Unfortunately we just can`t accommodate them all,' said clerk of the course Richard Pridham.
'So it`s goodthat Carlisle and Hamilton have offered to help us out.'
No problems are reported at Saturday`s remaining meetings at Newmarket and Wolverhampton.
And a joint Jockey Club/British Horseracing Board statement confirmed that RaceTech, the providers of starting stalls, the camera patrol service and photo-finish facilities, will provide a full service at Friday and Saturday`s meetings.
