Triton Thames (exposed) Thermostatic Concentric Mixer Shower

I have this shower fitted and it seems to have developed a drip (slow) which is very annoying.

At first I thought it was just water in the hose & shower head but tonight I unscrewed the shower head and emptied it of water and reattached it. A couple of hours later it is dripping again and when I unscrew the shower head it is full of water.

The flow control lever is turned as far clockwise as it will go so I guess that some seal has failed.

Is this easily repaired?

Thanks for any help.

i believe triton have a 5 year warranty on valves
how old is yours
if older speak to tech and they will send service kit with instructions
or advise you-not too hard to change

Yes this is an ancient message but ir shows up high on the search results for a dripping Thames concentric shower mixer.

Ours had been dripping on and off, with on becoming the more significant for a few years so eventually it needed addressing.

The solution, at least for the last few months was free. After removing the levers and the dials they screw into (spring clip holding the flow control dials) I removed the cartridge and loosened the 8 grub screws for the slide valve. Instead of removing it, I rotated the front plate a few degrees clockwise and did up the screws again so that it could be slightly more 'off'. Reassembled, moving the flow dial to the same position as previously for off and the problem went away.

Hopefully this gets a bit more life out of your dripping Thames Concentric shower mixer without spending ~£150 on a slide valve.