looks like an old Aqualisa, the link below shows fitting instructions so you should be able to remove it.
If you are left with 2 exposed pipes and tiles intact a bar shower should fit easily but you will need one with a surface mounted kit .
You might want to pick up a couple of 15mm speedfit blanks incase you run into trouble.
Good luck.
https://www.aqualisa.co.uk/Aqualisa/...e.pdf?ext=.pdf