“… of Churchmead Church of England School [2011] UKEAT 070810/2005 (multiple debilitating conditions); and O’Cathail v Transport for London [2012] EWCA Civ 1004, [2012] IRLR 1011 (depression). In O’Cathail Mummery LJ said in terms at para. 27 (p. 1013):…”