Airport parking in Britain
If you want to park your car at the airport, but do not want to pay the "sometimes excessive" costs of on-site parking, try using a company offering off-site parking close to the airport. Off site airport parking sees your car left in a secure car park close to the airport with a mini coach ferrying you to and from the airport itself. Prices are often very reasonable. A great example of this is the SKYPARK company at Liverpool airport whose service we can personally recommend.
The other alternatives are Taxi or private hire transport to and from the airport.