Jeremy Clarkson may be a certified petrolhead but his cameo appearance on the re-boot of The Grand Tour shows there's still a very canny business brain operating amongst the gasoline fumes. The 66-year-old manages to turn the opening minutes of the six-part Amazon Prime series, now presented by relative unknowns Francis Bourgeois, James Engelsman and Thomas Holland, into a sizeable TV ad for his various Cotswolds tourism ventures. The new trio, who replace Clarkson, James May and Richard Hammond, are seen making a 'pilgrimage' to Diddly Squat Farm in episode one...to ask for permission to use the original Grand Tour studio marquee - which has been re-born as the Farm Shop.The 5,000 square feet khaki-coloured tent has large fluorescent orange lettering on its roof, spelling out 'GT - The Grand Tour' and has become a popular must-see for visitors to the Cotswolds. In his few minutes on air Clarkson, who presented The Grand Tour with his co-hosts from 2016 to 2024, manages to showcase his popular tourist attraction with gusto.The new presenters are seen whizzing through the beautiful countryside in vintage cars before pulling up at Diddly Squat Farm, which features in another Amazon TV hit, Clarkson's Farm. The original Grand Tour studio has been repurposed by the enterprising 66-year-old former host at Diddly Squat Farm...housing the cafe, off license, farm shop and butchers - and tourists who've travelled from far and wide Shrewd: Clarkson tells the new hosts, relative unknowns Francis Bourgeois, James Engelsman and Thomas Holland, that they can't possibly use the original Grand Tour tent because it's proving too popular at Diddly Squat Clarkson bats off their request to use the tent for their version of the show with a 'not really', telling them: 'It's got a butchers in it now and a bar and a shop and an off-license'.Basking in the commercial success of his rural business ventures, he follows up with a deadpan: 'It's usually quite busy' adding: 'I want to help but look...it's been re-purposed.' Few might have predicted just how popular the Cotswolds attraction would become when Clarkson opened it during lockdown in 2020. This summer saw tourist queues out of the door at the farm shop, with some visitors left waiting for almost three hours to get the chance to shop in the TV farm store.Earlier this year, Clarkson asked West Oxfordshire District Council for permission to extend the 'temporary car park' on the site until 2030. A ‘Jeremy Clarkson’s Cotswolds’ tour now even exists, taking bus-loads of tourists on a day trip from London to see sites including Diddly Squat, the £12.5million house he resides in with partner Lisa Hogan and the Hawkstone Brewery, near the historic town of Burford, where Clarkson’s beer is brewed. The Farmer’s Dog pub in Asthall, opened two years ago, is also on the list. Queues this summer at Diddly Squat Farm Shop...Clarkson has applied to extend the temporary car park at the attraction until 2030 Jeremy Clarkson with his partner Lisa Hogan in a still from his Clarkson's Farm show This week, Clarkson's partner Lisa Hogan, who co-founded Diddly Squat with the TV star after the pair met in 2017, said extreme heat over the past four months has led to poor yields which are threatening not just the quantity of beer produced, but also the quality. Ms Hogan suggested higher prices might also be on the way as suppliers struggle to satisfy demand.She said: 'It is a struggle because if you have another bad harvest, you won't be able to supplement, say, by getting grain in from Poland.'So we just have to pay a higher cost, and then we have to try not to pass that on to the customer. But you know, there'll be lean times, and then there'll be times of feast.'Last month, Mr Clarkson said the harvest at Diddly Squat was 'f*****' because of the scorching summer.The farm and pub owner posted a screenshot of the BBC weather forecast for nearby Chipping Norton showing a high of 29C (84F) to Instagram with the caption: 'Harvest already f*****. May as well just enjoy it now.'The Grand Tour reboot marks the first full series without Jeremy, Richard and James as its main presenters.The trio first became household names together on Top Gear, where their mix of ambitious road trips, studio features and challenges transformed the BBC programme into a global success before they reunited for The Grand Tour on Prime Video in 2016.Unlike former Top Gear presenters Freddie Flintoff and Paddy McGuinness, who were already well-known television personalities before joining the BBC motoring show, Thomas, James and Francis are making the transition from digital platforms and enthusiast communities to front one of streaming television's biggest automotive brands.