Puzzle #20: shortest route!

Credits to Ian H.

For this puzzle you are going to need an “Official map” of London (from memory or the internet).

Whilst I’m not going to give you an easy clue…

…do think about shortcuts to the destination.

Bond Street to Chance = 4

Leicester Square to Kings Cross = 4

Liverpool Street to Go = 6

Marylebone to Piccadilly = ??

As always, think outside the box and don’t get bored! Have fun!