Hey doe mixer bath tap that has a shower connected give as good a shower as a bath shower? Is much easier to do this to have a shower above the bath than, chase pipes in to the wall for a bar shower.
Depends on what plumbing system you have. Unvented cylinder or combi system = good flow usually, but on a tank fed gravity system you might not get great pressure unless cwt level is several metres above.
If you want a simple solution you could buy a thermostatic bath shower mixer.
regulates the temperature to stop scalding but like all combi systems if another tap is turned on the shower could go cold but should never scald anyone in the shower