Jubilee line’s alleged 1970s Lewisham safeguarding debunked

Many years ago, I read somewhere that when the Jubilee line was planned in the 1970s, they made space for its tunnels to pass through Lewisham town centre.To explain, when the Jubilee line (at the time the Fleet line) was being planned, it would have run from Stanmore to Baker Street over the existing railway, and then through new tunnels to Charing Cross. From there it was expected to eventually pass through the City of London and Wapping then head, via various possible routes, down to Lewisham