On reading a client's ESA85 the HCP has recorded "client was advised of MSO process anjd the they should not attempt any moves that may cause pain".

We're stumped to know what the MSO process is though; "Medical Services Observation" perhaps...

Any ideas?

Medical Scrutiny Ordeals by Mocking, Sarcastic Officials of Morally Suspect Organisation, producing Maddeningly Specious Observations and Mostly Stupid Outcomes

Something like that I should think anyway!

Alternatively it could just stand for Must Sign On

or more likely (but boring) Musculoskeletal Overview -

"The examination should follow the standard clinical pattern of inspection,palpation, joint movements, muscle power, sensation and reflexes – if appropriate. The following notes should be read in conjunction with any appropriate Atos Healthcare examination protocol".

All contained in the ESA Medical Advisors Handbook (Clinically Robust, Approved Publication)