— British Transport Police, which is almost entirely funded by the rail industry, has 3,069 officers with similar powers to those of regular police.
— The Civil Nuclear Constabulary, with 1,500 officers, secures nuclear power plants and the transport of nuclear materials around the country.
— Cambridge University Proctors, who used their powers of arrest mostly to detain prostitutes and unruly students, gave up policing powers in 1970 and now perform more of a ceremonial role.
— Oxford University Bulldogs kept their powers until 2001 but the force was disbanded two years later.
— A 2005 study in Nature compared it with the Encyclopedia Britannica and found that in 42 entries both had four serious errors. Wikipedia had 162 minor errors and Britannica 123.
— The Leveson Report misattributed the foundation of the Independent to a Californian student thanks to Wikipedia.
— For some time Wikipedia contained references to a bogus medical condition called glucojasinogen, which in turn came to be quoted in two learned journals.