A show off salesman killed an innocent mum and himself after crashing his supercar at 100mph as he tried to impress his 18-year-old girlfriend.

Window salesman Gary Jordan, 62, had taken student lover Laura Cheeseman, 18, out for a spin when his turbo-charged sports car ploughed into a car driven by Jayne Kemp, 41, killing her in front of her 17-year-old daughter Hannah.

The award-winning Anglian double glazing seller - who was twice the drink drive limit - had boasted to his girlfriend of previously doing 190mph in the convertible Nissan ZX300 Turbo.

The inquest into the horror crash on a 30mph-stretch of A259 near East Dean was told how widower Mr Jordan and Ms Cheeseman had been out drinking before he took her home on July 10 last year.

Ms Cheeseman, who did not attend the inquest, said in a statement: "He said he'd show me a secret car.

"He opened the bonnet and showed me the engine.. Gary told me he'd done 190mph on a previous occasion."

The inquest was told Mr Jordan sped along the road and ploughed into a Ford Ka driven by Scout volunteer and Lloyds TSB worker Jayne Kemp.

She had been out shopping with her daughter Hannah and had just finished playing badminton at around 9.30pm when the accident happened.

Mrs Kemp died of multiple injuries at the scene as her 17-year-old daughter - who was trapped in the car - watched.

Witnesses told the inquest that Jordan's driving had been "manic" as he drove from his Blatchington Mill home in Seaford.

Hannah Kemp, who now lives in Worthing, suffered a broken wrist and needed 18 stitches to a cut on her forehead She told the inquest that her mum had screamed seconds before the impact.

She said: "I knew there was going to be a crash as soon as mum shouted. I knew mum had not made it."

Retired ambulance technician Anthony King was on his way from Brighton to his home in Eastbourne and said the car was doing at least 100mph, describing the driving as "manic".

He told the inquest "I heard this dreadful roar and a white vehicle overtook me."

Fellow motorist Brian Minster, a consultant, was also overtaken by Jordan's car and said his own vehicle shook as the Nissan sped past.

The inquest was told that Mr Jordan’s teenage passenger Ms Cheeseman later told a friend who visited her in hospital that Mr Jordan had been "silly" and was driving too fast.

Neither of them were wearing seatbelts.

Coroner Alan Craze said Mrs Kemp had done nothing wrong, adding: "Jordan was drunk and driving far too fast."

A spokesman for the 11th Eastbourne Scouts, where Mrs Kemp worked as assistant leader, added: "Jayne was a valued leader, a good friend, and a fine role model for our scouts. It was our privilege to have known her."

The cause of death for both drivers was recorded as multiple injuries and coroner Alan Craze, sitting at Eastbourne Magistrates Court, recorded a verdict of death by road traffic accident for both Mr Jordan and Mrs Kemp.