I posted back in September 2018 about how Merseyside’s non-recyclable waste is moved to the north east of England to be used as fuel in Wilton Power Station. See link below:-
Since I penned my original posing I’ve come across an excellent video on You Tube by Don Coffey showing detail of the railway movements. If you skip to 2h & 10mins for the section from Rainford Junction to Knowsley you can watch the Merseyside/local part of the route.
Excellent video Don, thanks for sharing.