No wonder you’re all as mad as a box of frogs .. Having just changed a bath mixer tap I can see why ... plenty of choice words were screamed I’d wired and fitted 4 Down lights in half the time it took to do it ..
On a plastic bath it's a dodle on a cast iron bath where the taps are set in red leaded putty it's impossible
I used one of those , to be honest it was only made difficult by the plumber who did the original install, the pipe work made it very difficult to get the spanner in easily and get some purchase on it , I’d bet he ( or she) piped the tap and drops up before fitting the tub
I had ones in a cast iron bath where the tap holes in the bath were square, as was the base of the taps and everything had seized. It took 2 of us over an hour to get it off.
We had square holes and square taps when everything was made in England ,the foreign stuff with round holes started to come from Europe when the trade barriers came down but we still had square taps , chuffing nuisance
But we have the satisfaction that all Continental tap threads are really British. Johnny Foreign thinks he's got DIN tap connectors, but really they're 1/2" and 3/4" BSP. Ha! That'll teach them to install bidets and eat croissants.
We did go “American” with Unified threads in the 60s. Your old Ford Cortina was held together with’em.
Hmm, so that's why could I look at the road under the nearside wheel arch from the passenger seat then!
