Other Plumbing question, leaking shower tap

I've noticed recently the selector for the shower/tap in the bathroom has started leaking when in use, I'm assuming the valve isn't too happy so needs replacing.
Did some online action, nothing really of any use comes up.

This is what I have, all be it slightly older. Any suggestions as to what I'm looking for? I'm assuming a 1/4 valve?

https://www.screwfix.com/p/swirl-traditional-deck-mounted-bath-shower-mixer-tap-chrome/28552

 

I'd just try PTFE tape first, the simplest solution is usually the best with plumbing I find!

 

I'll give it a whirl, next job is getting the cartridge out, thankfully its after the taps so no need to turn off the water.

 

To be honest, if you are going through the whole hassle of disassembling it - it probably wouldnt hurt to replace the cartridge anyway if you are in a hardwater area.
It might just be the rubber washer has given up on life, you can usually just reverse them or replace them for new ones. - Should be a standard size.

 

Was just about to suggest it - cartridge will be the issue, skip to the end and replace it, don't bother trying to bodge with PTFE, it can just cause more issues than it solves tbh.

 

Yeah just trying to work out what cartridge it is

 

Unless it's a really crappy one it'll be pretty well marked in my experience, I actually found Screwfix have a really good range of cartridges - it sounds daft but I wasn't expecting them to, as their stock depth isn't usually that good.

 

My usual routine for diy parts is, screwfix - toolstation, Wickes - travis Perkins. If they don’t have it, then dreaded eBay or AliExpress.