A few miles short of Swindon my car, laden with four teenagers, my wife, one teenager's boyfriend, a dog, and attendant baggage comes to a sudden and it turns out, permanent, halt.

Two days later Hyundai Trajet Y264 TKP is shunted into a Cornish garage, and declared by the owner George to be "finished".

Or in the words of the recycling industry, it has become an end-of-life vehicle.

Here rusty hulks lie forlornly in a line waiting for scrap - after hundreds of thousands of miles of family holidays, car-sick children, back-seat driving, wasp-rich picnics and school runs.

Remembering the car was 12 years old, I chirpily mention that a £150 cheque from a scrap merchant would come in handy.

"£150? Lucky to get £50," says George.

George sits in his office outside the tiny Cornish village of Doublebois and patiently explains the macroeconomic forces at play that have reduced my car to a hunk of worthless metal.

China, he reckons, is the problem. With Chinese demand falling, the price of iron ore is on the way down and scrap metal prices are following in their wake.

A year ago George could have got £160 for my car. During the Beijing Olympics prices skyrocketed.

Not now. "There's a worldwide glut of metal," he explains.

And Y264 TKP is 75% metal, albeit dented and scratched by bike racks, my mother's gate post and, for reasons too complex to go into, the teeth of a small pony.

There are other problems too - the collapse in demand, unsurprisingly, from Ukraine, and the eurozone recession.

One insider put it bluntly: "The business is bloody painful".

Charles Ambrose of the UK's Motor Vehicle Dismantlers' Association (MVDA) said: "In the last few years we've lost 30 members or so going out of business. Most of them are long term players. They are being kicked from all sides."

George will bear away poor crippled Y264 TKP to be eviscerated in an "authorised treatment facility". It will be "de-polluted", the battery, and tyres removed, the diesel, oils, and brake fluids sucked out.

The oils will be re-refined or used as fuel. The battery will be ground down, the acid neutralised, the polymers separated from the lead, to go towards making a new one.

Of course, I could bypass George altogether and get a little more - cash in hand - from someone, er, less respectable.

The MVDA believes 600,000 of the 1.7 million cars scrapped every year simply fall off the official radar, unregistered, untaxed. The paper trail vanishes into a black hole, or rather a black market.

Environmental niceties are not observed on the black market.

But the expense of putting anything in a landfill in the UK and the difficulty of dumping cars means even the vanished ones work their way back into the recycling system.

"It's hard to know exactly where those cars go," says Mr Ambrose. "We know a tremendous number are broken up and the parts end up on eBay.

"Others are exported as whole cars or as spare parts. Parts of your car could end up in a vehicle in Nigeria. That's not a problem environmentally. It's still recycling.

"But the money involved in this kind of black market is often also involved in crime."

So one way or another almost 95% of Y264 TKP will be recycled. The UK is expected to hit the 95% car recycling target set by the European Union's end-of-life vehicle directive this year or next.

Which is why the plastic bits of Y264 TKP, like the cup-holders stuffed with my daughters' hair-ties, will not go to landfill.

The legislation has forced industry to come up with recycling solutions - at a cost.

Ian Hetherington, director general of the British Metals Recycling Association says: "The capital expenditure to develop this kind of technology is very high indeed, and it is only profitable when you are producing very high quality plastics at the end of it."

So the American firm MBA Polymers invested $30m (£20m) to develop technology to recycle high grade plastics.

Its joint venture with the UK's European Metal Recycling (EMR) in Worksop recycles 80,000 tonnes of plastic every year. The plastic pellets are then sold to manufacturers.

The alarming truth is the plastic trim of Y264 TKP, which the dog did such appalling things to on the way home from Scotland in 2008, could end up as part of a Nespresso coffee machine.