That's exactly why I placed the VNOC on October 21st or thereabout. He's obligated to write it by October 17th, IIRC, the EU council meeting is on October 19th. By October 21st it would be all over, one way or the other, once the extension is agreed nothing BJ does or doesn't do should be able to change it.
Plus I doubt not writing the letter would work at all. EU obviously knows British law better than BJ does and could come up with an answer to Parliament anyway, acting as though he did write the letter. It would be quite unprecendented, there would be a conflict in British democracy: the Executive branch refused to follow a law so it was bypassed in an improper manner. It's precendens-setting and possibly something to be debated in the Old Chambers.
But assuming BJ doesn't write the letter but Parliament gets the response anyway, what can he do? Stomp in front of the people he broke the law to ignore and claim it was improper to have obtained the answer they were seeking?
McHrozni