Gainign access to seals in shower mixer

[poolebybirth]

Am trying to get the disc / name plate off the front of my shower mixer (round type), to get to the valve, as the seals have worn - water is dripping out underneath the front. But don't want to damage the face of it. ANy tips how I can remove this easily; i have tried a thin screwdriver but this also seems too thick.

Shower is AQUALISA.
Manual mixer, low pressure.

 

[Seanikk]

not fitted many Aqualisers, usually a very fine screwdriver carefully inserted under the name badge, gently apply a lever action, once removed the control valve retaining screw should be visible, this simply unscrews and the control body pulls straight off giving access to the cartridge body nut,

regards Seanikk