1) Labour is voting on their policy for the next GE regarding Brexit, with the options
a) not deciding between remain/leave before election
b) campaigning for remain in next GE
b) would be a blow for Corbyn, as he is endorsing a)
a) probably only goes through if the unions overrule the CLPs which could cause massive uproar
it's also possible that they vote for both ....
2) Supreme Court might rule on parliament suspension, this could turn out either to be a blank cheque for BJ to power ahead or recall parliament, or rule against Johnson and be ignored. Everything's on the table.