Thanks Glyn,
The glass doesn't appear to go all the way to the bottom, so I think it would be OK.
Method Statements & Risk Assessments are not a problem, and I am going to ask about anchor points and weight ratings of the walkway.
The reason I really want to WFP it is I would be OK sending out 1 guy to do the job, but using harnesses and ladder access turns it into a 2 man job.
Do you sell these goosenecks in your photos and can I adapt them to fit a SL2?
Al