The agency shares its offices with New Star Asset Management, which is headed by John Duffield, the entrepreneur who appears to be, for want of a better word, rather touchy.
It appears that Duffield is rather particular about the parking space he's been allocated. So when he arrived at work last week to find someone had had the audacity to park in his own space, he acted fast.
Parking behind the offending vehicle, Duffield wedged it in and ordered his secretary to set up a 3pm showdown with the JWT executive - none other than the non-executive chairman, Tim Davis. But although Davis pitched up, clearly proving he was keen to smooth over this overblown affair, Duffield only showed after 30 minutes - by which time Davis had departed.
Rather than letting the matter lie there, Duffield apparently picked up the phone and got on the blower to none other than the WPP group chief executive, Sir Martin Sorrell - with the ludicrous suggestion that such a flagrant display of flouting car parking etiquette should result in Davis being sacked.
A suggestion which, obviously, was ignored.