In message , John Rowland
writes

http://www.johnchaple.co.uk/romanroad.htm

It is a little hard to see why the Romans - who did indeed usually, but
not invariably, build roads in straight lines - would have aligned their
principal road in England to miss their main river crossing (at London
Bridge) and totally avoid their principal city in England, merely in
order to traverse swampy marshland and cross the river at an almost
unknown location at Thorney island.

However, it has been suggested before (so "you read it first hear" seems
a bit implausible). Basing research on early 18th-century sources such
as Stukeley (long before any reliable historic method was established)
and tiny shifts in ground movement seems to me to be very hopeful - on
London clay you can expect such ground sinkage in less than a century,
let alone in almost two millenia.

--
Paul Terry