A man who travelled nearly 200 miles to reach his injured mother arrived before an ambulance reached her.
Mark Clements caught a bus, tube and two trains from London to Exmouth, Devon on Saturday after his 77-year-old mother fell and broke her hip.
The initial 999 call was made at 09:00 GMT but paramedics did not arrive until seven hours later.
South Western Ambulance Service apologised and said it was experiencing "an unprecedented rise in demand".
Hugo said on social media: "This is clearly unacceptable and I am making urgent enquiries".