DIY Question - Key to remove these from the wall

[Jeremy2014]

Hi Guys, took over a flat for investment and the flat has these attached in the bathroom and the kitchen. What kind of keys do I need to remove them?
I am sure it is very simple but so far no luck with screw driver.
Was going to break it fully but dont wanna dammage the wall.
Thanks

 

[Koolpc]

If you havent got a key, maybe use a hacksaw and cut the tops. Then you can get at the screws...

 

[Burnerman]

See that slot at the back of the top piece?
Get a broad screwdriver in there, press down and it should unclip.
John

 

[accelerator]

Failing that, use the image to do a search by image on Google and find the manufacturer, then ask them.

 

[Old Salt]

Is the bottle held in the holder by the screw top lid?