Princess Eugenie, who was treated at the hospital for the disfiguring back condition scoliosis when she was 12, was unveiled as the patron of the appeal in April and will take part in the Nightrider challenge, in which 3,000 cyclists ride a moonlit 100km route around London on Saturday evening [9th June 2012].

The specialist neuro-musculoskeletal hospital in Brockley Hill, Stanmore, aims to raise £15million over the next five years to equip its buildings with the latest technology and create extra facilities once a basic rebuild of its entire site is completed.

Princess Eugenie also discusses the recent Diamond Jubilee events.