"....their condition was described as 'wet'."
-- unnamed St Mungo's Hospital spokesperson (DP2)
As reported in the article, a three broom “pile-up” occurred over the River Mersey involving five ticket-holders to the Celestina Warbeck concert who were running late. While no one was seriously injured, they were taken to St Mungo’s Hospital as a precaution (DP2).
Although the date printed on the second Daily Prophet Newsletter (DP2) is 8 February 1999, the timeframe for this event is 1992-1993.