Have just heard of Gung-Ho obstacle course, inflatable run event. I'm not sure if it's a new event.
I'm tempted to go for it. Also 44% off tickets at the moment throughout January!
https://begung-ho.co.uk
Gung Ho have obstacle course events 5k in:
Chester
Manchester
Uttoxeter
Leeds
Swansea
Birmingham
Edinburgh
Aberdeen
Glasgow
Maidstone
Blackburn
Reading
London
Southampton
North East