Since the car was built the return radiator hose as been a long flexi pipe, this was never a good solution. At some points the pipe rubs which eventually would have cause a leak.
To solve this the flexi pipe has been replaced with a 90 degree aluminium bend and very short run of flexi pipe on either side.
Aluminium bend installed in the car
New pipe from below (missing the hose clamps in this photo!)
Filled and bled the coolant system, checked for leaks.
No functional difference, but safer long term.