With most corporate partners enjoying their least hectic summer since, er, last summer, The Diary was heartened to hear that the recent upturn in IPO activity has at last signalled the return of the infamous ‘all nighter’.

This month’s £4bn Yell flotation certainly proved to be an exhausting affair for the City corporate team at Weil Gotshal & Manges, who went without sleep for an astonishing two-and-a-half days towards the end of the telephone directory business’ London IPO.