a) attempt to unpick the detail of Irish Protocol (& perhaps some other bits) & bring a modestly amended WA back to Parliament,
b) abandon May's red line on the EEA (the suddenly bold act).
(b) is the more likely to succeed;
(a) is the more likely to happen (because BJ will be surrounded by advisors who want the negotiations to fail (to get to no deal));
If Parris is right, (b) should be natural proclivity of a lone-wolf 'columnist'.