Victoria Line Challenge: 'I'm walking London's tube lines

Victoria Line Challenge: 'I'm walking London's tube lines

Victoria Line Challenge: 'I'm walking London's tube lines

Victoria Line Challenge: 'I'm walking London's tube lines

Victoria Line Challenge: 'I'm walking London's tube lines

Victoria Line Challenge: 'I'm walking London's tube lines

Victoria Line Challenge: 'I'm walking London's tube lines

Victoria Line Challenge: 'I'm walking London's tube lines

Victoria Line Challenge: 'I'm walking London's tube lines

Victoria Line Challenge: 'I'm walking London's tube lines

Victoria Line Challenge: 'I'm walking London's tube lines