Peter McNaught, London Underground's Operations Director, said: "London Underground has an excellent and continually improving safety record and such incidents on the Tube are very rare."
McNaught added: "We apologised fully to our customers, worked hard to resume services as soon as possible and our staff were on hand on the platform to assist those who were leaving the train. We have fully assisted the RAIB in their enquiries, as well as carrying out our own investigation.
More top news
Julie Etchingham meets the original Foxy Lady - her cousin Kathy - who talks of life with former boyfriend Jimi Hendrix in their old flat.
Transport bosses have admitted a decision about funding for Luton's railway station's much-needed facelift will not be made any time soon.
A man who helped officers apprehend a suspected drug dealer by sticking out his foot and tripping him has been hailed a "legend" by police.