Sod it... I took thescuttle o ff the other week to reseal it to save new dis pack getting wet.. Looking at the " how to" why ( after disconnecting power sounder) would I need to refit it? Cant I sling it in the bin?
You can disconnect & remove the PS  without completly removing the scuttle. I  did one on the silver 3.2 last week .
I removed drivers side wiper arm , the one torx screw on drivers side & the first 2 or 3 scuttle clips on that  side.
Scuttle will then lift enough to be able to get to the 10mm nut that holds the PS in place. Just undo it a few turns & the it 
will lift off upwards & out. ( I did not try to  fit a replacement  PS with  this method though as only removed mine)
 Disconnect electrical connector & wrap with insulation tape if you are not fitting a new one .
As for the old PS  . . . Don't just bin it  . . . see maintenance guide as to why  
 
 
  HTH
If you go to the Wycombe meet on Saturday  . . . no doubt someone will remove it for you  . .  even if it's me   
 
  EDIT: Ah   . .  just noticed  . . . unlikely you will  be going to Wycombe as you live in North Wales
EDIT: Ah   . .  just noticed  . . . unlikely you will  be going to Wycombe as you live in North Wales   
 