After looking at the service manual, I noticed the connectors for the limiting valves by the pump were on the opposite way round [Blue plug closest to the chassis, white opposite]
I swapped these over to where the manual said they should be and now the right side drops!
To me this shows the bag,lines and solinoid valve for the left side must be OK.
Also I am still trying to find out what the 'residual pressure valve' on the ACE system is.
Regards
Simon
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