How do I open the Aqualisa Aquavalve 609 Thermostatic?

Could you please advise how to open the Aqualisa Aquavalve 609 Thermostatic head, after I cut the water supply? Is there a screw behind the white knob insert? And if so, does this white insert just pop out using something sharp?

I then found the Shower Doc video:

https://www.youtube.com/watch?v=djUi3SB5-y8

I am trying to get to the root of the leaking problem, as can be seen in the attached photo, any additional help and suggestions would be appreciated!

Regards, Dan
Asked 9 years ago by Anonymous

Press the logo on the left and it will come off revealing a screw.

The leak in these is usually the cartridge , so a new one will be needed.

Answered 9 years ago by Anonymous

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