thanks for the question i would suggest you to take a look at the following link i think you will find all the information you need, as they used various contractors to do the job: http://scrapbook.channel4.com/programmes/grand-designs/bookmarks/series-9/episode-5

could you please let me know the maker of tap and wc. thanks

We at Prestige Bathrooms supplied a lot of the sanitaryware and brassware for the water tower: we can be contacted on 0208 998 3969 or our website: prestigebathrooms.com
Mahmoud Visram

Looks like a company called Boffi http://www.boffi.com/EN/Collections/bathrooms/taps/pipe.aspx and I see they are for sale here http://www.reuter-shop.com/catalogsearch/?q=boffi

it is indeed Boffi, also sold at: www.inoxtaps.com which ships worldwide