'I fell down the stairs at Oxford Circus station and woke up in hospital with half my head missing'

Alastair Wallace fell down the steps at Oxford Circus station - (Supplied)

When Alastair Wallace fell down a flight of stairs at Oxford Circus station in 2019, he had no idea that a single missed step would alter the course of his life.

The then 46-year-old from Willesden Green was knocked unconscious after hitting his head, only to wake days later in intensive care.