I did not, but as I was buying a load of other stuff from Toolstation I'm comfortable with that being a lesson learned. Plus, two of the Tado units got fucked by the plasterers so I'll need at least two of the sensing heads until I can be arsed to source replacements (at the plasterers cost).
You know that you can get valves from Wickes / other plumbing places without the head on?
M30 x 1.5 is pretty standard these days too.