Valves for gravity feed shower

[mdurkin]

Hi All,
I'm intending to fit a gravity feed shower - there's about 7/8m head and it's a mira unit designed for gravity - my dad has it and it gives a decent shower with only about 2m head.

I would like to have a pull switch outside the shower cubicle that turns on the lights, the fan and the shower (to allow it to warm up before we step in). I was wondering if I could use zone valves for this purpose or if there are valves designed specifically for controlling water outlets.
Does anyone think this is a good/bad idea - I've not come across it before. I guess it will be a bit like those (expensive) digital showers that can be turned on from outside the cubicle without a temperature indicator (and the associated cost).
Thoughts?

 

[swbjackson]

Just turn the shower head towards the side of the cubicle, lean in and turn it on. If you want a shower you can control remotely buy one, don't waste your time bodging something together.

 

[mdurkin]

There's an overhead 'rain' unit that can't be turned away.
I've looked for anything that's compatible with a gravity system and the only units sold are more advanced, expensive and have a built in pump. Our shower upstairs has a pump and frankly it wakes the whole house up and probably next door.
I was hoping to simply use valves to turn the water on and off, I don't need digital temperature control or a pump. All I need is a couple of full-bore valves, but I was looking to see if anyone else has used such valves on a fresh water circuit (such as to a shower) rather than on central heating. Also, are 22mm zone valves generally full-bore?
Seriously - I don't want to botch anything, but it would be nice to have a reasonable cost solution that means I don't have to freeze my b*lls off every morning starting the shower!
Thanks,
Matt