Racing:Sandown's high-class card featuring the Blue Square Tolworth Hurdle was abandoned following a second inspection as the weather continues to play havoc with the racing programme.
Officials at the Esher venue checked at 7.30am after temperatures fell to just below freezing until midnight, with cloud cover for the rest of the night meaning it was just above freezing.
Although the track was unraceable at that point, daytime temperatures forecast for highs of plus three to four had given rise to an initial degree of guarded optimism.
However, clerk of the course Andrew Cooper explained: "To be fair the temperatures have gone back on us and dipped back below freezing.
"We needed to show some improvement and we did not feel in our judgement and knowing this place that there was enough time for us to persevere.
"It was a very disappointing inspection in the sense that we were hopeful first thing as we had escaped the worst of the frost overnight and it walked pretty well at that stage.
"The daytime temperatures took us back a degree or degree and a half. The sun is out but it is not going to have a great effect on the bits that we need it to."
On the subject of the Tolworth being rescheduled, Cooper added: "I think in principle, with it being a Grade One, the BHA will look to reschedule it, but that is an issue for them now and the problem would be finding somewhere suitable and raceable before the next event in the Pattern for novices."
The jumps fixtures scheduled for Saturday at Ayr and Folkestone had already fallen by the wayside, although Cork got the go-ahead after an 8am inspection.
Officials at Cork called the early-morning check following the forecast of a severe overnight frost, but gave the all-clear. The first of six races commences at 1.20 and the ground remains heavy.
The meeting at Naas on Sunday is off with the track covered in snow
Prospects for National Hunt action on Monday look bleak, with both Lingfield and Wetherby frozen in places. They inspect at 7.30am and 8.30am respectively on Sunday.
Lingfield clerk of the course Neil MacKenzie Ross said: "We had a minus four overnight and we are currently frozen solid in all the exposed areas.
"We are not raceable and with forecast temperatures of minus three tonight and Sunday night followed by temperatures barely above freezing during the day, it doesn't look good."
His Wetherby counterpart Jonjo Sanderson said: "We wouldn't race today and if the forecast is correct we are going to struggle - we need some positive temperatures just to shift what we have got."
Snow-covered Hexham inspect at 7.30am on Monday for Wednesday's meeting.