@Julz I think the meeting reference is more of an organisational one, but Greg might comment.
I’ll be away for the next week but happy to have a one-to-one on the relationship between OpenActive and Open Referal UK any time after that. @Ian-DigitalGaps and/or @andrew-newman might chip in (probably best in this thread). In the meantime, I’ve dug up this short document on a planned OA/ORUK use case MBT10001 - Points for an OpenActive / Open Referral UK use case which might be of interest.
I think the international group hopes to have a meeting on aggregators (aka federation tools) - see here. It would be good for you to join that if/when it is firmed up.