Hillinghead suggests that the fact the character in the photograph carried a cane implies that he might have a limp. While possible, it is not a reasonable supposition because, in the Victorian era, many gentlemen carried canes as fashion accessories, not because they needed them.
At 42 minutes in, referring to the photograph, it is stated that a gentleman's cane in the right hand might imply a limp on the left leg. A cane, in those days, was a fashion accessory, which every gentleman would have. It would not imply a limp but only that the gentleman was right-handed.
The camper van that Hasan is trying to trace has the registration NH9543. That is not the correct format for a UK number plate.
The street lamps in the 1800's scene seem to be electric when they explode. But in those years almost all.street lamps were gas driven.
The boy selling newspapers in the scene from the 1800's yells "half penny". It's usually pronounced "ha'penny" or "hay-penny"