It definately doesnt do it stationary?
To change the top mounts round, you need an allen key set (cant remember the size), a 14mm 1/2" drive spark socket with the plastic middle bit removed, adjustable spanner and a pair of grips.
The allen key goes through the socket (on the top mount) to keep the shock still, you loosen that round while holding the allen key still.
I don't live too far away from you if you want to pop down soonish and I can have a look?