The ERG are about as important as Garcia is at City.Difficult to interpret this latest development other than BloJo doesn't want no deal at the moment and the ERG (wanting and having tasted no deal ) will be sh1tting themselves.
Leaders normally go across to these final meetings for a symbolic sign off when everything has been agreed upon up front .
Unless Barnier and Frost and their respective teams have agreed a deal behind the scenes and kept it secret ( unlikely as Brussels leaks like a sieve) then IMO there is no way BoJo is going to go over there and negotiate a deal where there is still a lot of detail to be resolved.
A lot may depend if the meeting is between BoJo and UVDL and/or the Council ( remember Mavis got shredded bythe Council).
Maybe they will both compromise at the top level ( EU on fish and UK on LPF and governance?) giving the negotiators a few days to sort out the details.
Still think it's 50/50 ( as I have done for a while now).
Labour will be backing the deal, over no deal, so Johnson doesn’t need them.