Wiring the Great Western : are electric trains worth the money?
They say time is money, so how much is a minute worth to you?
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If you had a vital meeting in London, or were heading up to see a show, what would you pay to get there a minute earlier?
I ask because Transport Ministers reckon a minute of our precious time is worth £83m. You read that right. Today's plan to electrify the Great Western Railway costs £1bn. It will shave 12 minutes off the Paddington to Temple Meads journey. Value for money?
"Unalloyed pleasure" was John Savage's reaction. The chief exec of Business West has been banging on about a fast train to London for decades. "Getting to and from the capital fast is one of the main reasons people move here, and move their companies here," he told me.
On the platforms, they're a little underwhelmed. "12 minutes?" say Max and Hannah, students travelling to London. "Not sure it makes a big difference really."
They, like many others, are more impressed by what electric trains will save the planet. Department for Transport figures suggest carbon emissions on electric trains are between 20 and 35% less than diesel locos. But there's a problem with these stats.
The electric line will come to Bristol, then on to Swansea. But for Weston-super-Mare, Taunton, and all points west the locos will be diesel. Which means the trains that run from London to Bristol and then on will be "hybrids". Electric power units AND a diesel engine will pull the same train.
"So," I ask the man from the ministry, "does this mean the electric engine will have to pull the diesel loco and all its heavy fuel?" Yes it will, I hear.
"So all the way along the super fast super clean super green electric route it will be lugging a great diesel loco and be much slower and heavier than it need be?"
That, I'm told, is an unduly cynical view. But yes, the facts are true.
How full is your glass? For optimists, today sees a revolution bringing faster, greener trains and boosting business. For cynics, a vast amount of money we can ill afford buys you another 12 minutes to wait for a tube.
What's it worth to you?








Hello, I’m Dave Harvey – the BBC’s Business Correspondent in the West. If you’re making hay in the markets or combine harvesting; scratting cider apples or crunching tricky numbers – this is your blog too.