London transport chiefs accidentally renamed a station - before hastily replacing misspelt signs when the error was pointed out on Twitter.
Rail workers were pictured putting up the sign - containing the legend 'Theobolds Grove' - at Theobalds Grove London Overground station on Sunday.
Twitter user @diamondgeezer noticed the error, posting a picture of the official sign being erected at the station, which lies just outside the M25 in Waltham Cross, Hertfordshire.
"At Theobalds Grove station, @LDNOverground contractors are currently installing signs WITH THE WRONG SPELLING," he tweeted.
The post was retweeted scores of times, with users labelling the error a "#sloppymistake" and suggested that the graphic designer responsible was "awaiting a P45".
And Nico Hogg pointed out that this was not the first time such an error had been made at the station:
The signs were being put up as part of the extension of the London Overground network to the Liverpool Street to Enfield Town line.
A Transport for London spokesman told the Evening Standard: "We are aware that a small number of misspelt signs were put up for a short period of time at Theobalds Grove today.
"They have been removed and are being replaced with the correct signage."