Lavatories will be free, funded by an ad-reel video displayed on the back of the cubicle door.
Times,Sunday Times
Beyond 20 and you're looking at the shoes of a security guard, underneath the cubicle door.
Times, Sunday Times
He met the contact in the lavatory and the files were handed under the cubicle door.
Times, Sunday Times
There are precise descriptions of the social codes involved in such encounters (who knocks on which cubicle door and when) which go on too long.
The Times Literary Supplement
It had been left on a hook behind a cubicle door but 'was not concealed in any other way'.
The Sun