I see from the Mercia FR website that Jim Tinnion is organising a Stretton Hills race this year on the date usually used for the Carding Mill Canter (first Saturday in March). Stretton Hills is 1.4km longer, with 55m more climbing and a lot more route choice than the Canter. https://mercia.giz.me.uk/node/3112

I tend not to make firm decisions on races more than a week or two in advance, but I'm definitely considering this one.