The London Mayor was reportedly stuck in Hither Green due to the disruption, which has affected services from London Cannon Street and Charing Cross throughout the day, and arrived in Sidcup half-an-hour later than planned.
Whilst in the Bexley town Mr Johnson, whose signature flyaway hair was nowhere to be seen, officially opened Chislehurst and Sidcup Grammar School’s new sixth form centre – which is a lasting part of the Olympic legacy.
The building was bought by Bexley Council for just £1, having originally been built as the BMW Group Pavilion during the Games.
Picture: AK Photos
It has been transformed for use by pupils at Marlborough School - which caters for kids with severe, complex and physical learning difficulties – and Chislehurst and Sidcup Grammar.
The centre includes a sixth form study base, new classrooms, IT suite, purpose built classrooms for those with special needs, hygiene rooms, and leisure facilities.
Mr Johnson, whose brother Jo Johnson is the Orpington MP, said: “This new sixth form centre is a fantastic example of the legacy that hosting the London 2012 Games has produced through the redeployment of structures and fittings from Queen Elizabeth Olympic Park.
“It will offer greatly improved conditions for the students to get down to their all-important studying.”
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The Tory MP and Brexit backer also chatted with school captain Madeleine Legemah, who told him of her future ambitions to join the Labour Party, become prime minister and make sure Britain remained in the EU.
Chislehurst and Sidcup Grammar head teacher Nigel Walker said: “It has taken three years but what has been created is a building to be proud of, one that cements a unique partnership between two schools and is a true legacy of the London 2012 Games.”
Bexley’s cabinet member for education Councillor John Fuller added: “I am really pleased that this new building not only sees the 2012 legacy continue in the borough, but also that it will be used to further strengthen links between Chislehurst and Sidcup Grammar School and Marlborough School.
“Our Marlborough students will particularly benefit from this great new facility. I’m delighted that by working together we were able to help make this happen.”
Meanwhile, mayoral candidate Zac Goldsmith continued his campaign trail in Sidcup – with a visit to MacDonald’s.
He denied that the EU referendum is in danger of overshadowing his bid to become London mayor, as he was joined by Mr Johnson.
Mr Goldsmith also intends to vote to leave the EU, and claimed a vote for him as mayor would allow Mr Johnson’s legacy to continue in the capital.
The mayoral elections are due to take place on May 5, with the EU referendum on June 23.