LOT 737 incident, June 2007: crew's poor English blamed
The AAIB has issued a report into an incident last June, in which a LOT 737-500, "meandered helplessly" (to quote the Daily Telegraph) after takeoff from LHR, due to communications problems between the aircraft and ATC.
http://www.telegraph.co.uk/travel/tr...tructions.html
http://www.aaib.dft.gov.uk/cms_resou...KA%2006-08.pdf