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8.50am Three bombs explode within about 50 seconds of each other at three different locations on the London Underground network. Transport for London initially suspects a derailment and power surge.

9.15am All trains on the network are stopped as TfL goes into emergency mode, known as 'Code Amber'. Station staff instruct passengers to stay on platforms until told that conditions outside are safe and that the incident does not involve chemical, biological or nuclear substances.

9.47am A bomb located on the top floor of a double decker bus explodes in Tavistock Square near Euston Station.

All bus services in central London suspended.

10am Tube passengers eventually led out to street level.

3.30pm Bus services resume in central London.

Friday am Tube services resume.

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