In the late 1960s, P&O established ferry services in the North Sea and English Channel. Roll-on/roll-off operations and containerisation were introduced and new ships, facilities and investment was needed to take advantage of developments. What followed was several decades of growth, buyouts and divisions.

It seems bizarre that in a place as crowded, noisy and expensive as London there are still wasted unused spaces. The relentless drive for regeneration across Britain's capital deceives us into thinking that every spare building and patch of ground is under development. But this vast metropolis of more than 10 million people hides many secrets and unexpected treasures from the city's unique 2000-year history.