Not really sure this is the right place for this but I’m looking to take my son on the river for some pike/perch fishing - I want to get him a decent life jacket. Has anyone got any recommendations or know anywhere around Bedfordshire I can go to get a decent quality one with solid advice to go with it?

Check out the spinlock deckvest junior
I've had a regular deckvest for a number of years and thankfully it's never needed to be deployed. Bought following a recommendation from a yachty friend.
They're light and unobtrusive and 5 year warranty.
There will be cheaper ones available but I for one wouldn't scrimp