Ouch! Sorry folks.
This is pretty poor on behalf of BA as well for letting this through, though,
Surely the headline is utterly misleading:
"Collect at least 6,000 Avios when you book and stay with IHG® before 15 December 2016."
Not least because accelerate usually means you have to dine, apply for a credit card and download an app as well as just staying with them.