Boris Johnson arriving in Cornwall ahead of the G7 summit (Image: Boris Johnson)

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Boris Johnson has come under fire for flying to the G7 Summit in Cornwall, which will include talks on tackling climate change.

pictured him saluting as he stepped off a plane after making a 253.5 mile journey from 10 Downing Street, via Stansted, to Newquay Airport.

He wrote: "I’ve arrived in Cornwall for this year’s G7 where I’ll be asking my fellow leaders to rise to the challenge of beating the pandemic and building back better, fairer and greener.

"It will be a busy and important summit, and I can’t wait to get started."

Social media users wasted no time in pointing out that there were numerous more environmentally-friendly ways to have made the trip.

Upon landing, Mr Johnson told reporters: "If you attack my arrival by plane, I respectfully point out that the UK is actually in the lead in developing sustainable aviation fuel and one of the points in the 10-point plan for our green industrial revolution is to get to jet-zero as well as net-zero."

We did some maths to work out which option could be the cheapest, quickest and greenest to make the journey:

By road

(Image: Google)

Time: 4hrs 51mins

Cost: £52.51

Google suggests two routes to get to Cornwall by road from 10 Downing Street in central London.

The quickest route highlighted is via the A303 and A30, and, without any hold ups, should take four hours and 51 minutes. The second way is along the M4, and then the M5 which it says should take around five hours and 29 minutes. That is the also the longer route at 277 miles, compared to 254.

The total cost of petrol would be around 19p a mile, so £52.51 for the longer route and £48.15 for the more direct route.

By air

(Image: REUTERS)

Time: 3hrs 20mins – 4hrs

Cost: £94.98

Boris is understood to have flown from Standstead to Newquay by private jet and the flight took 49 minutes. For us regular Joes, travelling by air would likely cost a lot less but it adds 30 minutes to the journey.

Flights are not available every day but easyJet does fly from London Gatwick to Newquay Airport. A return would cost £94.98 and flight time is one hour and 20 minutes.

You would have to factor in arriving at the airport in time for your flight with more airlines recommending that you arrive two hours before your flight time.

Boris the Spaniel said on Twitter: "I fly from Newquay to London.. We'll I did on the Ryan Air jet.. 90 mins to airport, 60 mins check in 45 mins flight 60 mins clear airport 60 mins to meeting. Train.. 60 mins to station, 5 hrs on train 60 mins to meeting. Flight wins. Although work can be done on train."

By train

Time: Five hours

Cost: £220.40

If you wanted to get a train to Cornwall from London in time for the start of the G7 summit on Friday, there is one journey still available that hasn't been sold out.

According to Trainline there are still spaces left on the 8.04am from London Paddington to Newquay (with one change). It is due to arrive at 1.05pm and costs £151.50.

The return on Monday involves two changes which means the journey would take seven hours. The total cost of the return journey would be £220.40.

While flying might be the fastest way of getting there it is not as good from a green perspective, with air travel not comparing well to travelling by car or rail.

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Time: 26 hours

Not for the faint-hearted, but it is possible to cycle from London to Cornwall. Google estimates that journey would take 26 hours and you would have to factor in an at least one overnight stop for the journey.

London to Lands End Cycle Route book suggest a journey that runs over two weeks. You can see it here.

According to the site EcoPassenger, which calculates per-passenger carbon emissions between destinations in Europe, for a person traveling from London to Paris during a popular travel time (so when trains and planes are likely to be more full and thus more efficient), the CO2 output would be 122 kilograms if that person flew, versus 48 kilograms if he or she drove or 15 kilograms by train.

Zip Wire

Boris promoted the Olympics with a zip wire stunt back in 2012
(Image: Barcroft Media/Barcroft Media via Getty Images)

Time: 8.5 hours

And finally, given the PM's history with this thrilling travel method, it seemed only fitting to give it a mention.

One social media user suggested: "How about; If a tower was built in London high enough to run a zip line from it directly to St Ives calculate what velocity would BJ be travelling at when he came to a crashing halt in St Ives? Bonus Question: Who doesn’t think that would be a good use of public funds?"

Doing the maths, we worked out that the PM would need 408,773 meters of wire to get to St Ives, and at an average speed of 30 miles per hour, he'd likely make the 254 mile journey in eight and a half hours. We will ignore the physics.