We don’t know for sure but I reckon it will be nutters off full blast. I think 550 riding so far and even with staggered Cat starts must be ample opportunity to draft. Certainly if I get dropped I won’t push on but wait for next group to join.
Tommy,
I will try and post a link to a live feed later but otherwise as Andy says.
Andy,
I would log in an hour early and join the pen at least 15m beforehand
I joined Cat C with a few minutes to go and ended up right at the back of a 199 strong peleton

Had to burn a lot to get up with the front group - first 2 mins I was at max, as were most other people. Don't know about Cat B and A races, but C guys went off like the clappers
Was in first 5 or so over fits 8km. Got to the hill and I ended up 64th

Kept at it though, worked with various groups and finished on the road 23rd. I could see a few C's above me with w/kg higher than 3.4 so I'll likely get promoted even higher
@CXRAndy sorry i couldn't help you more. i finished my 2 laps and went back in for a warm down. I didn't have much left in the legs but I thought I'd try to join you and try to let you draft the last bit of energy from my legs and give you a bit of a rest. Didn't really work though - kept shooting past you and I figured I may have been doing more harm than good so I let you crack on. Hope you did well
