The ACP season kicks off at the start of November, unlike the AUK one which runs from October.)
I presume this means that a BRM ridden in the UK during October would count as a pre-qualifier for ACP purposes, even though it is in the wrong season?
I've had someone asking for late entry to my 200 because he wants to use it as a PBP pre-qualifier (tbh, I hadn't anticipated this circumstance when I decided to make it a BRM, it's purely fortuitous). I've had to knock him back as the event is full, but I will point him in the direction of other BRMs remaining in 2018 - which include the Lancashire Lights 200 on 21st October.
I shall also let him know that he'd be better off doing one of the 600s or the 300 if he intends it to be a PBP pre-qualifier.
ETA: found the answer to my question in Ivo's post in the other thread:
The international season ends at october 31st. All BRM's ridden until then count for the pre qualification. Depending on where you're residing (France or outside) BRM's from november 1st count as qualifiers.