Mick. wrote:
Hi all, I live in a ground floor all electric 1 bedroom flat.

I do have a bathroom with a short bath in it; if possible I would like to
have fitted a bath mixer tap with a shower hose fitting.



In the airing cupboard there is a cold water tank on top of an insulated
tank with an off peak immersion heater .

The top cold water tank is at the ceiling level.

The hot tank below is at the top 4'2" from the floor.



Could this have enough pressure to use a bath mixer tap with a shower hose
fitting?

No.


Or is a separate electric shower unit the only way?


No. convert the existing tank to a mains pressure one, and live happily
(amd quietly)ever after.


Hoping someone can advise me.

Mick.