Friday's race meetings at Bangor and Newcastle have been abandoned due to waterlogged tracks.
Clerk of the course at Bangor, Andrew Morris, had planned to inspect conditions at 8.30am, but he made a slightly earlier call, following further rain overnight.
He said: "We had 20 millimetres of rain in the last 24 hours and it was a simple decision to abandon.
"We were just fit to race yesterday morning but the further rain means we aren't fit now and there is more forecast."
Clerk of the course at Newcastle James Armstrong inspected the venue this morning but following further overnight rain, he was forced to call off the meeting.
He said: "We had eight millimetres of rain overnight and there's been a heavy drizzle all this morning .
"We are due another 4-7mm tonight and another 3-4mm tomorrow. The track is waterlogged, it is the same areas as last time we abandoned that are effected and we can't avoid them."
This afternoon's meeting at Huntingdon goes ahead as planned however, after the track passed a morning inspection.
Clerk of the course Sulekha Varma reports the hurdles track to be soft, heavy in places while the chase track is heavy, soft in places, but both courses are raceable after just under five millimetres of rain overnight.