Regarding the removal of the rear shock, I have found a typo in the workshop manual.............. On page 547, section 13 subsection 19 it says
• Remove:
Upper Tie-Rod Nut and Bolt [A]
Lower Shock Absorber Nut and Bolt
The upper Tie-Rod bolt ie the rear most bolt, will not clear the silencer. To remove the shock I removed the lower bolt. It's obviously been well designed so that this can be done in a matter of minutes. Hope this helps someone avoid the hassle I had. Regards JR