So it seems like it is easily possible to have 50 Antminer S9 in the UK as long as the building has 3 phase power supply, cost of setting it all up is around £5k from a qualified electrician and you will also need extractor fitted for heat to leave the building and louvre for air to come in which is another £5k.
So to run 50 Antminer S9, here is a simple process! It is definitely not as complicated as people have made it out to be!!
You will need:
1) Order 50 x Antminer S9
2) Order 50 x PSU
3) Rent an Industrial Unit with 3 phase supply
4) Order Shelves to house the miners (you don't need anything fancy or expensive believe me!)
5) Get an Electrician to install sockets / upgrade Fuseboard
6) Get an electrician to fit extractor and louvre
7) Wait for your Machines
Plug them in and setup
9) Wait for them to mine
10) Enjoy!
It might be cheaper to have multiple units than paying to get supply head upgraded.
Unless you can get an old factory for quite a cheap rent that has high supply already in place.