Newcastle set to inspect
This afternoon's meeting at Newcastle is subject to a 9am inspection.
Officials at Gosforth Park called the impromptu check after overnight temperatures surprisingly dropped to -3.5C.
Racing is due to begin at 2.20pm.
Clerk of the course James Armstrong said: "It was forecast to get down to zero at the very worst.
"A lot of it (frost) is just a fine crust, but it is not in the ground too far.
"Things should warm up a great deal this morning, so I'd still be very hopeful - unless something extraordinary happens."
