Judging from yesterdays NWCCA Stage in Northwich lots of folk were using Tacx Antares rollers, placed on blocks of wood, using their CX bikes. Your main issue might be going close to the paddock, start line to be able to use your rollers depending on what the car parking is like. I took my rollers yesterday but I was parked quarter of a mile away so any warmup benefit would have been lost, as the race was the last of the day and we had to wait 30 minutes after the posted start time anyway!. And it was pissing it down! Still had a great ride though and I’ll be going again next week, can’t wait! 🙂
Some clubs had taken Gazebos to shelter in which is a great idea if they have a lot of riders. May be worth doing if you’ve got a few mates going if you’re not in a club.