I am trying to increase the temperature of this shower, it is combi fed but I dont know the name of the type of shower. i have had the temp control off turned the knurled center to its hottest and put the control back on. I have had a previous thing (different house) and I basically dismantled part of it, pulled a piece off turned it slightly and put it back on and this allowed hotter water. But as I done know whats behind the plate a bit reluctant without advice to proceed.
The temp in the taps is roasting so not a boiler issue.

Anyone know these type of taps and what to do, thanks