A passenger's journey from Singapore to London was significantly disrupted due to a glitch. The glitch occurred at major British airports and affected air traffic control.

The passenger, a Singaporean, experienced a 20-hour delay as a result of the issue. Their journey involved multiple modes of transportation, including air, land, and sea travel.

Further details about the incident and its impact on the passenger's travel plans are available from the source, which recounts the Singaporean's experience with the delay caused by the air traffic control glitch.