Saturday’s racing at Aintree, Sandown and Chepstow is going ahead despite weather warnings for snow and ice across large parts of the UK.
Conditions are expected to ease through Saturday, with the heavier snow forecast overnight into Sunday.
The course at Wolverhampton will be inspected on Saturday morning.
Inverness Caledonian Thistle v Falkirk in the Scottish Championship was postponed because of snow and Peterhead v Clyde in League Two is also off.
In England, Woking’s match at Gateshead in the National League is off because the pitch is frozen.
Is Manchester derby at risk?
BBC Sport’s Simon Stone:
Manchester United host Manchester City in the Premier League on Sunday at 16:30 GMT.
It is fair to assume no problems are expected with the Old Trafford pitch or the stadium itself.
However, if the surrounding areas become dangerous it would be a matter for the local council, the police and United’s Stadium Advisory Group to make a decision.
They would take into account road and rail networks for ease of getting to and from the game, plus accessibility of pavements in the areas surrounding the stadium and whether they pose a risk to safety.