A coroner asks Humberside Police to review its policing of Pearson Park after the death of a woman.
North East Lincolnshire Council says drugs including cocaine could be part of a contaminated batch.
Humberside Fire and Rescue Service says all passengers and the driver were evacuated from the bus.
Police say the 27-year-old's motorcycle left the carriageway on Goxhill Road, Barrow-upon-Humber.
Humberside Police say the motorbikes were seized and the riders reported for high-speed offences.
Reuben Wilson from Beverley has been handed a 10-year sentence at Grimsby Crown Court.
The Humberside Police officer has been dismissed from her role after breaching standards.
A watchdog says there are "gaps" in some areas of Humberside Police's performance.
Chris Todd writes an open letter looking back on his first 12 months with the Humberside force.
