All,

My recent attempt to change my spark plugs fell at the first hurdle when I
couldn't fathom how to remove the engine 'beauty' cover ...

It appears to be held on with four black nylon fixings with virtually
featureless heads ?  There are two tiny slits on them for some special tool
I imagine, but do they unscrew, 1/4 turn, 'pop' out, etc ??

Any help on this, or any other likely obstacles on the way to changing my
plugs would be much appreciated.

tia

Steve