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An ageing motorist tried to shake off a pursuing police officer by activating a James Bond-style smoke screen he’d fitted in his car.

Simon Chaplin, 62, flicked a switch on the dashboard of his red Peugeot 309 and “colossal” amounts of smoke billowed from the exhaust pipe, a court heard.

Police constable Dafydd Campbell Birch only caught up five miles later when Chaplin turned into a farmyard, Swansea Crown Court was told.

Chaplin had a bucket of diesel behind the passenger seat connected to a pump with a pipe leading into the exhaust.

(Image: Wales News Service Ltd.)

'I thought his engine had blown'

At the flick of the switch diesel was dripped into the hot exhaust pipe to produce clouds of smoke.

Driver James Belton came across the chase going in the other direction.

He said in a statement read at court: “I thought his engine had blown. The smoke was covering both carriageways and I had to slow to five miles an hour.”

Chaplin was convicted of causing a danger to other road users by deliberately causing smoke to be emitted at the end of a brief trial but the jury cleared him of possessing an imitation firearm in a public place.

Pc Campbell Birch said he wanted to stop the Peugeot because its number plate was “DE JURE”, which “didn’t look right.”

He turned around on the B4329 near Haverfordwest and was met by clouds of smoke as Chaplin accelerated away.

The officer followed Chaplin through country lanes and villages – sometimes only by using the smoke because he couldn’t actually see the Peugeot.

Read more: Police inspector condemns 'irresponsible and reckless' actions of driver caught by terrifying dashcam footage

He said: “There was a vast amount of dense smoke coming out the back. It completely obscured the road. I had to slow down and keep a distance.

“At times I came to an almost complete stop due to the smoke. I had to look across the top of hedgerows to see where he had gone.

(Image: Wales News Service Ltd.)

Smoke machine 'for moles'

“For a while I couldn’t see the car but in the distance I could see smoke going up a hill towards the village of Crundale. I caught up with him but the smoke kept coming thick and fast.”

Pc Campbell Birch cornered Chaplin in the farmyard. He got out of the Peugeot and appeared to hide something behind a post.

The officer told him he was watching and Chaplin retrieved a replica 9mm self-loading automatic-firing Beretta handgun and put his hands up.

Chaplin claimed to the jury that on January 19, six days before the incident, he was attacked by police officers who dragged him out of his mechanical digger and knocked his head on the ground several times.

He said they later drove him to Withybush Hospital, Haverfordwest, where they put him inside an ambulance. After being treated he was placed back into police custody but returned to hospital by the officers when he became unwell.

(Image: Wales News Service Ltd.)

Read more: 'Lunatic' dangerous driver sped away from police after taking cousin's car at house party

Chaplin said he saw Pc Birch activate a flashing blue light “but sort of panicked” and feared “he was going to be beaten up again”.

The defendant said the car, the smoke-making “contraption” and fake Beretta – which could, in fact, only fire ball bearings – all belonged to another man.

He said the smoke machine was designed to get rid of moles.

(Image: Wales News Service Ltd.)

James Hartson, prosecuting, pointed out moles lived underground but Chaplin said that during normal usage a pipe would be connected to the end of the exhaust and pushed into molehills.

Chaplin, of Parc y Delyn Uchaf, Hebron, near Whitland , Carmarthenshire , will be sentenced at a later date and was granted bail though Recorder Elwen Evans QC warned him he may be jailed.