In what could be a nip and tuck affair, this will be Williamson's 18th game of the campaign, and his crime count isn't too impressive, having already dished out 63 yellows and sent five men for an early bath.
Earlier this season he cautioned five men in our 4-2 home defeat to Rochdale, including Steve Brogan and Danny Harrison.
His assistants at Field Mill will be:
M. Blackledge from Cambridgeshire and Mr A.D. Hutchinson from Cheshire.
The Fourth Official will be Mr A.C. Newell from Lancashire.