looking around at ideas for toilets and something like below may be an option, though how difficult are these to service is something goes wrong in the cistern / pipe connections leak. 

 

If you have tiled over the cistern do tiles have to start coming off?

 

Access from behind, or if not possible then a boxed out area to mount on with a removable lid.

They are serviced through the button panel 

have a look on you tube 

 

 

We have 4x Geberit concealed cisterns as per the video, and we had one for 10+ years in the last house.  And you can service them through the hole.

 

My choice was made based on the fact we have the same ones in the office I work in and they lasted around 4 years without showing signs of needing repair, this would equate to about 40 years of domestic use.  

 

Also noted on you photo it shows a full height tiled wall, which whilst looking better, takes away 6" of valuable space, A shelved wall is useful, especially in a small room.  

 

 

 

Edited November 22, 20223 yr by Blooda

We had them in a previous house. Out of 5 loos 3 failed (same fault) within 5 years.  I had real trouble finding replacement parts and eventually got a box of 5 units from a building company liquidation. Replacing them wasn’t terribly easy either as the space through hole was just big enough for the part and my hand. 

50 minutes ago, Kelvin said:

Out of 5 loos 3 failed (same fault) within 5 years

who was the manufacturer?

Geberit

I couldn’t sort mine through the hole and neither could plumber so I ended up pulling the top off

6 hours ago, Kelvin said:

just big enough for the part and my hand. 

Shouldn’t stick your part and hand in small holes …