This two-foot "fire escape" might be more suited to Houdini than an office full of barristers.
Looking like something out of a Lewis Carroll novel, the pint-sized portal was allegedly snapped at Stone Buildings, in Lincoln's Inn, Holborn, before being shared on Twitter.
A sign is clearly mounted to the door reading "fire escape - keep clear".
Vincento, who photographed it, was "just admiring the buildings around Lincoln's Inn" when he saw the door nestling between single building blocks and standing an estimated 18 to 24 inches high.
"Would look better with an 'Alice' stood next to it, though," he added.
Fire safety regulations stipulate minimum widths for fire escapes dependent upon the number of people who are likely to need them. Curiously, however, there are no rules about the minimum height of a fire exit.
"The final exit doors should open easily, immediately and, wherever practicable, in the direction of escape, i.e. outwards into a place of safety outside the building," the Fire Safety Advice Centre explains on its website.
Lincoln's Inn is one of four "inns of court" where law students train to become barristers in London . A spokesman from the treasury office confirmed the door was being used as a "secondary exit", adding the Inn "regularly reviews access and egress issues with expert advice as appropriate".
