The term "Purple Parking" is simply the name of a company who manage the parking facilities at Heathrow Airport. They are not the exclusive providers of parking at this airport and their prices are comparable to other operators.
Avis does have rental cars avilable at Heathrow Airport in the United Kingdom. Avis is a popular option for car rentals. Avis is a well known company.
BAA. British Airport Authority - which is a Spanish owned company.
Only the British Airways company offers valet parking at the Heathrow Airport. However, the valet parking services are actually operated by LHR Airports Limited and APOCA.
The cheapest car hire at Valencia airport is probably the famous company that everybody knows called Enterprise and use their program called Rent-A-Car.
There are many companies that offer cheap Stansted Airport parking. Examples of companies that offer cheap Stansted Airport parking includes Holiday Extras and the official Stansted Airport parking sector.
Accor Group owns the novotel in London Heathrow airport. A company that owns many hotels around the world. They are the world's leading hotel group in Europe with hotels in 90 countries.
Usually the shipping line provides a bus link to the local airport, e.g. in Bergen, Norway, the Hurtigruten coastal voyage company has a bus to take arriving passengers to and from Flesland airport.
The travel agency which provides information on a cheap car hire company at the Heathrow Airport is Expedia. One can hire cars from Sixt, Hertz, Europcar, Alamo Rent a Car, Dollar Rent a Car, Enterprise, National Car Rental and Thrifty Car Rental.
Windsor Cars is a private hire taxi service based in Windsor, Berskhire, United Kingdom. The company specializes in executive hires and airport transfers and especially advertises services to and from Heathrow Airport in London.
The Cheapest cable company in Texas is Dslone.
There are several modes of transport which can be taken between Heathrow and Gatwick:National Express operate up to six services an hour between the two airports, with a journey time of around 75 minutes. Tickets are £25 for an adult and can be purchased online, National Express ticket desks at the airport or from the coach driver.There are no direct trains between the two airports, therefore to make the journey by train, you would have to change trains in central London. As there are several option, the journey time is between 70 and 90 minutes. The price is roughly between £15 and £45.Also, taxis/chauffeurs can be taken which take around an hour. The cost is around £60 for a taxi and from £80 for a chauffeur.The full details of the options available are on the Heathrow Airport website. I have attached the link below.