Their souped-up supercars have become an annual feature on the streets of west London, when the 'summer season' is marked with million-pound Ferraris outside Harrods and Masaratis in front of the Dorchester hotel.
But aside from their love of fast cars and expensive boutiques, little is known about the lives of the incredibly rich Arabs who frequent the capital's most exclusive districts every year.
But one of the men who helps organise the annual influx of the Middle East's most wealthy has now lifted the lid on their eye-watering spending.
A valet helps a young Kuwaiti get out of his Lamborghini Aventor in Knightsbridge this week. He one of a clique of super-rich Arabs who spend the summer months in London at great expense
Young millionaires from the Middle East hit the capital's upmarket western districts for the 'summer season'
The Saudi owner of this £1million Porsche had a specialist team come to his central London hotel to clean it
Michael Shaw, whose company Franklin organises homes and staff for the world's elite, told MailOnline of the thousands his clients spend on making sure their beloved vehicles arrive in pristine condition, their outrageous property demands and the army of domestic staff who rush around them.
The carnival of colourful cars parading down Knightsbridge and around Sloane Square has become a tourist attraction in itself in recent summers, with visitors to the capital spending as much time photographing the outlandish vehicles as they do shopping for souvenirs.
But the appearance of the sportscars is the result of months of planning and work on behalf of huge teams of staff.
Mr Shaw says some of his clients book their vehicle on to a ship weeks before they plan to arrive, while others are happy to spend £40,000 to have the vehicle packed up and put on a cargo plane.
He said: 'We have clients all around the world, but those from the Middle East tend to come to London not just because it's so hot over there, but because they want to spend time around and be seen in London's amazing array of restaurants and hotels.
'Having an expensive car is the ultimate status symbol and that's why our clients want to bring them over here with them.'
Some of those who come to Britain pay £40,000-a-time to have their cars loaded on to a cargo plane
Some are flown via Italy, where they are 'returned to showroom condition' by specialist workshops
Michael Shaw, whose company Franklin helps organise accommodation, staff and travel for the super-rich
Mr Shaw's company also organises the garish bodywork and paint-jobs which make the cars stand out. He added: 'We had one client who wanted his Lamborghini gold plated, and not just painted gold, but really, gold-plated. The work ended up coming to around five times the original value of the car.
'Some have homes in Italy with garages of classic cars and supercars, who fly them in from there. There is also a workshop there which offers £7,000 detailing jobs, using infra-red light to remove every little scratch and return to car to its original showroom condition.'
Not all of the cars are flown in however. Some of those arriving in London hire the vehicles at huge cost from specialist car hire firms.
A Ferrari 430 Spider can be rented for around £600-a-day, while a Lamborghini Aventador costs an astonishing £2,000 for just 24 hours.
The carefully-tended cars sit outside their owner's hotels overnight, like these outside the Dorchester. Mr Shaw said the wealthy Arabs choose London because of its luxury hotels, restaurants and boutiques
The cars, like this one outside Harrods, spend their days ferrying their owners between shops and cafes
As well as the cost of flying their cars in or hiring them, coupled with the fees of a high-security garage, many foreign billionaires employ a personal 'chaperone' for their vehicles, to make sure nobody touches them while they are parked on the streets of Mayfair and Chelsea.
The bizarre role is one of scores of positions filled by Mr Shaw to ensure his clients have an easy a holiday as possible.
His firm recruits pet handlers, groundskeepers and even yacht crews to supplement the up to 250 staff their clients are used to employ in their own countries.
Some visitors spend weeks in £3,000-a-night hotel suites at Claridge's or Jumeirah, eating at exclusive restaurants like Scott's, Nobu or celeb-favourite The Chilton Firehouse.
Interior designers are also employed to ensure the apartments rented by wealthy foreigners suit their tastes.
Mr Shaw said: 'We always try to find properties which match clients' demands, but sometimes they ask that furniture or lighting be changed while they are there. We draw the line though that pulling up floors.
'We then have to return the property to its original state after the clients' stay.'
The cash and credit cards come out again when the summer visitors hit the boutiques of Knightsbridge and Sloane Street.
Mr Shaw says he has seen some shoppers spend £50,000 in ten minutes while shopping for jewellery and watches.
Harrods has also become a focal point since it was taken over to Qatari owners and is now a meeting place for many young men from the country.
Mr Shaw revealed: 'On returning home from London after the summer, one Middle Eastern family proceeded to have a £7,000 monthly order of food flown by air from Harrods to home.'