Cheapest I can find for a decent mixer
The wall mounted Triton Sema Thermostatic Mixer Shower is simple in design and suitable for most bathrooms.
Features: Surface mounted bar mixer, adjustable maximum temperature safety shutdown, and a single pattern scale resistant showerhead.
Type of shower: Mixer.
Usage: Suitable for both high and low pressure systems.
Effects and finish: Chrome.
Guarantee: 5 year manufacturer's guarantee included.