Hiding wc Cistern in a false wall

[Staplebrau]

Hi Chaps

In my ensuite we have a standard toilet, along the same wall as the hand basin. I want to create a 'bench' across the back wall, to sit a free standing basin on. This would mean that the top of the cistern (and importantly the flush button) would be covered over. My thought was that i could create a hidden cistern, putting the flush button either in the top of the new 'bench' or in the front of the false wall.

i dont have any pics but the attached pic essentially shows the exisitng layout.

http://www.donstiles.com.au/images/randall/Randall_Ensuite_layout.gif

1, is this possible?
2, would i need to replace the whole toilet or can i get away with just the cistern?
3, any advice greatly received!!

Thanks

Guy

 

[gasservice85]

http://www.screwfix.com/p/armitage-shanks-fluidmaster-concealed-cistern/30168

you will need a "back to wall" pan