I was reading a book about the Victoria Line (published 1988) whilst
at work on Christmas day and was drawn to a particular line which
described the line passing under an alleged plague pit. This had
apparently caused some discomfort for the workers at the time.

Having tried to follow this up on google I was somewhat unsuccessful
in finding a reputable source to back this up.

I wondered if anybody here might be able to share either any knowledge
or information about where I can find out about the underground
allegedly disturbing plague pits and other tunnels, etc.

One search result (on google) described a time when the TBM was
supposed to have knocked into another tunnel/pipe at Oxford Street.

Does anybody have any real information that is not rumour?