:)..well the key bit was identifying the numbering system on the green boxes, but if it helps, which I doubt it does, here's the original pic. The graffiti is long gone, but as you can see the box clearly has 25 on it.
Unless you are Roger Perry why don't you try and ask him. He must have either taken that picture ^ or paid someone to use it.
Roger Perry is raising funds for The Writing On The Wall on Kickstarter! The original book of London graffiti.
@Constable_Savage started
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:)..well the key bit was identifying the numbering system on the green boxes, but if it helps, which I doubt it does, here's the original pic. The graffiti is long gone, but as you can see the box clearly has 25 on it.