The man, in his 20s, fell six metres through the building near Little Gransden at around 11.15am yesterday (Tuesday). A spokesman for Magpas said: Doctor Rod Mackenzie and paramedic Mark Glover assessed the patient, who suffered serious leg injuries. They then worked alongside two EEAST ambulance crews to stabilise him. The man was then taken to Addenbrookes Hospital, Cambridge, in a land ambulance for further investigation. On arrival at the hospital, his condition was non-life-threatening.