Car rentals in the UK

Avis is the second largest car hire company in the world, providing business and leisure customers with a wide range of services at more than 5,000 locations around the globe.
It is the industry leader in applying new technologies.
On UK Avis website you can get a quote and book online in under 90 seconds in only 4 easy steps. Its effectiveness has been recognised by leading consumer and new media publications, and readers of the Daily Telegraph voted Avis as the "Best Car Hire Company 2003".
Its UK site gives a wide choice of new cars and very convenient online prices.
If you are travelling abroad, if you reserve and pay now you'll save money.

Here's the link:

Europcar is one of the leading car hire companies in the world, hiring more than 220,000 vehicles.
Europcar has a wide range of vehicles available for hire in over 118 countries around the world, including the UK and the USA, offering highly competitive prices on car & van rentals to both business and leisure travelers.
You can choose your country of residence from the 118 on the scroll list, for both pick-up and return of the car wherever you like.
Europcar has an efficient online reservations service, and excellent rates on a superb choice of vehicles from a rental station close to you. It also has special offers and discounts, constantly updated to ensure that it offers the most competitive rates at all times, including some great deals on longer term hire cars as an alternative option to leasing.

Here's the link:

Online Travel Extras is a user-friendly online service providing ease of booking car rentals in a matter of minutes with instant booking confirmations.
It works with multiple suppliers, so it can offer a wider choice of products and more flexibility at the best possible prices.
Reserving a car hire with them, you get instant email confirmation, good prices, all major operators covered, worldwide availability, and secure online payments.
On Online Travel Extras website you can also purchase travel insurance and reserve ferry tickets for all major European routes with the same ease, instant confirmation, convenience and receiving good value for money.

Here's the link:
Online Travel Extras

Record Rent a Car is the leading car rental company in Spain, and offers incredible prices for car hire at the major vacation hotspots in Spain.
Record Rent a Car has over 30 years experience and a fleet of over 20,000 vehicles, with a broad range of models and categories conveniently available at the major tourists spots in the Spanish peninsula: Barcelona, Málaga & Alicante; the Canary Islands: Gran Canaria, Tenerife, Fuenteventura & Lanzarote; the Balearic Isles: Mallorca.
It has reliable service, a clear and simple search engine, new cars every 6 months, all-inclusive prices, extra chauffers for free, and among the best online prices.
This is the link to its site:

Holiday Autos is the world’s largest online car rental broker with fully inclusive car rental in over 4,000 locations UK and worldwide.
It is part of Last Minute, one of Europe’s most famous travel web sites.
Holiday Autos selects only the best car rental companies around the world, and then negotiates the lowest possible rates from them, passing the savings onto its customers in the form of lower, fully inclusive prices.
It's easy and simple to book online with Holiday Autos, which unfortunately cannot be said of all major car hire companies.
It has its lowest prices on the most popular European holiday destinations, and its best prices are always online.
Being a broker, Holiday Autos is able to select only the best suppliers, ensuring that its quality of service, standards of safety, and value for money remain consistent.
A minimum £10 discount is given on all bookings made online via its website.
This is the link to its site:

London has four international airports: Heathrow, Gatwick, Stansted and Luton.
If you're flying, it may be useful to find accommodation near the major airports. Here's the link to a page with information on many hotels within the sites of London international airports or very near them:

London airports hotels

Visit the sites of so-called aggregators, which provide information on a vast array of companies and operators. Here we have selected a number of travel sites which offer comprehensive information and booking facilities for UK flights and car rental.

A leading travel specialist is Expedia, a comprehensive travel site for all sorts of needs, from flights to hotels, from car rentals to holiday packages, from holiday deals to guides and insurance.

Here's the Expedia search box to find flights, cars and hotels according to your preferences. Flights are for UK residents, cars and hotels for residents of every part of the world:

Onlinetravel is one of the UK's leading online travel providers, fully bonded with ABTA, ATOL, and IATA.
It brings you the UK's top choice of cheap flight deals, holiday discounts and special offers.
Besides cheap flight prices, you can find weekend city breaks, holiday bargains, and special, discounted fares.
This is the link to its site:
Onlinetravel

Ebookers is another very good choice.
Ebookers - UK & international flights, hotels, packages & car rentals is a British online travel specialist, one of the leading in Europe, offering complete travel services, including discount airfares with 120 airlines and international car rentals at much cheaper prices.
There are discounts for booking a flight online on certain flights.
You can also book hotels, holidays, packages and purchase travel insurance, all online.
They always have flight specials, car specials, flight and hotel deals, holiday specials and late deals.

Kelkoo is a shopping search engine to compare prices from hundreds of sites to find the best prices when shopping online.
Kelkoo helps you to compare prices for different types of services and products, including travel, flights, hotels, car hire, accommodation of all kinds, last minute holidays, weekend breaks, travel agents, and every other travel needs.

Here's the link:
Kelkoo

Travel 4 Less is a comprehensive website to research and meet all travel needs, offering tailor made holidays, discounted flights and independent travel arrangements.
Travel 4 Less, designed for both the independent traveller and the package holidaymaker, negotiates rates with leading airlines, hotels, car rental and tour companies, providing considerable discounts to the traveller.
It offers Car Hire 4 Less, up to 30% discounted car rental worldwide with leading companies such as Hertz, Alamo, Budget and Europcar, in over 4,000 locations in 25 countries: USA, Canada, Caribbean, UK, Spain, Italy, France, Portugal and throughout Europe, Australia, New Zealand, South Africa, Dubai, United Arab Emirates and others. It is cheaper to hire a car from the UK before travel than it is locally, and it's useful if you want to find a car waiting for you at the airport the moment you arrive.
Here's the link to this website:
Travel 4 Less