http://www.bbc.co.uk/news/uk-24135219

They must have spent at least five minutes on that one...

Probably the time it took them to walk from the green to the next tee..

Idiots if they think that this will be a deterrent for the hardcore alcoholics. With kids what can they do?

It's not a deterrent at all, just a way to get drunks of the street.
One question.... what happens if the drunks start fighting in the tank?

There may be a better way to deal with them and that is to tag them and impose a curfew on them. Nothing like a tag to keep them off the street. You cannot get into a fight except at home. There are probably enough laws already to deal with this than create a new private prison system that will probably need significant numbers of drunks to make the investment. It would be pointless to spend several million on buying and refurbishing a building to such standards, get past the NIMBY's who will have to have it near them.

You seem to be expanding the mandate somewhat beyond a drunk tank Amnesia.

They already have something similar in Norwich