Has anyone any suggestions for a SECLUDED river in the North West of UK especially near Clitheroe?

I want to do a fully clothed self baptism immersion in the river. Needs to be relatively private so some d***head doesn't phone 999 or try to jump in after me.

Any locations greatly accepted. This would be a midweek daytime dunking and don't mind anyone else joining me if that's your thing (especially Females). I'm male 62, no physical contact other than I may let you dunk me.

I had a look on Google Maps for your location and to be honest there really isn't much around, you might need to travel a little for somewhere decent