What is the purpose of the Williamson Tunnels in Liverpool?

Question

There are some tunnels under Liverpool, UK called the Williamson Tunnels, what is there purpose and why were they built?

Answer 1

There are suggestions that the Williamsons were part of an extremist religious sect which claimed that the world faced Armageddon several years hence. Williamson therefore built the tunnels as a place into which he and his fellow believers could escape to avoid the catastrophe and emerge later to build a new city