In 2004 the Council of Aston University decided that Birmingham needs an underground train system and a Forum was set up. Nothing more was heard about it because, most probably, their initial research found something that most Birmingham people knew about anyway.
A telephone exchange was built 100ft below ground to maintain essential communications in Britain in a nuclear attack. It was built in 1957 underneath Birmingham’s BT Tower and has a network of 25ft-high tunnels under surrounding streets, carrying cables that handle Birmingham’s millions of daily calls.
In recent years, the water table has risen above the exchange and BT has been pumping out thousands of gallons on a weekly basis to protect equipment’.