dighsx I'lll try and get more info, its a cemercialy bottled beer.
I have seen the vats they are about 4m rounds and 3 meters high. and theres about 6 per room.
they have water heating tubes inside and a wooden lid that is put on by crane.
Well off topic I know but there is a link to beer brewing in barrels here
The ones used in NZ are Gyle Tanks but are massive and very old.
I've seen them at the speights factory down south.
Rcnewcomb all good keep us in the loop.