The meeting at Naas on Thursday has been cancelled following a Wednesday morning check. It will now be staged next Tuesday.
It comes as Ascot’s clerk of the course Chris Stickels believes Friday’s meeting is “highly unlikely” to go ahead after calling an inspection for 8am on Thursday.
The Berkshire track is due to host to a high-class two-day fixture, with two Grade Two prizes up for grabs on Friday in the Porsche Kennel Gate Novices’ Hurdle and the Howden Noel Novices’ Chase.
However, with temperatures still well below freezing on Wednesday morning and little prospect of significant improvement, Stickels is not optimistic.
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He said: “At the moment we’re minus 2.5 degrees. It often dips lower at this time of day and this is as cold as it has got overnight. It’s a fraction colder than we were forecast and we’re still frozen in places.
“I don’t think the temperatures we’re forecast are sufficient really. We’re going to require higher temperatures than are forecast for racing to go ahead.
“We’ve got frozen areas under the covers and frozen areas in other places and we’ve still got a dusting of snow on the track.
“I think Friday is highly unlikely.”
Saturday’s feature event is the Grade One Howden Long Walk Hurdle, but Stickels is not looking beyond Friday’s card at this stage.
He added: “We’ll consider what we’re going to do about Saturday in due course.
“Friday night has never been forecast to be as cold, however I don’t know whether that is now changing.
“I’m concentrating on Friday at the minute and not Saturday.”
The next scheduled National Hunt meeting in Britain is at Ffos Las on Thursday and officials have announced a 7.30am precautionary inspection.
The team at Haydock have already called an inspection for 8am on Thursday ahead of their Saturday fixture, with prospects appearing bleak.
Uttoxeter, too, will inspect at 9am on Thursday for racing at the Midlands venue on Friday.
Even the all-weather action is under threat, with a precautionary inspection set to take place at 7.30am ahead of Chelmsford’s Thursday card in anticipation of a minus 6 frost overnight.