Leaking shower valve?

[A2Z]

So I have a bath/shower and it's leaking water.

From the wall, there is dual handle. On the right is temperature, on the left is water power. Twist to turn on/off.

The left part is where it's leaking, constantly. It started low but seems to be getting more and more.

I'm guessing this is something I can't fix myself?

 

[A2Z]

Yea I know need to turn off water first before doing anything!

Damn sounds like it will be complicated, better to get someone professional to do it?

I've uploaded a video of the leak - https://streamable.com/ov9wrt

 

[A2Z]

Ah yeah that looks like the cartridge to my noob eyes

So it's the cartridge on the temperature side on the right that the problem like @Hyburnate said?

The whole handle is actually not straight and tilts to the left slightly, so it would make sense it leaks on the right then goes to the left inside...

 

[A2Z]

yes flow cartridge on the left changed mine dripping a month ago - removing original/>10years to check on size required (& bracing/stilsons tap body) was the tough bit.

fortunately on removing it found that the body/valve part on other tap valve spares for kitchen/franke sink was identical,
but the splined side was too long 52vs 47mm , so put this in with ptfe tape which fixed leak, and the head of the tap had to stand proud,
then ordered the correct length one, which I then easily changed.

tap magician site good to see a complete catalogue of mftr size ...but can then buy at £6/7 pair in toolstation/screwfix.

Damn ok.... Thanks for the info. Sounds pretty complicated I'll do more research and see if I should give it a try as I would like to know more DIY stuff, or just get someone, I won't be paying anyway.