I used to use Autoglym Super Resin Polish and Extra Gloss Protection then moved on to Meguiars Gold Class and NXT products. I've used Poorboy's products for a while now and offerings from Menzerna, Mothers and Optimum.
I use Carlack-68 acrylic sealant as a base coat. Some of you may know it as Klasse All In One. It removes surface contaminants and lays down a micro-thin acrylic layer that protects the surface of the paint for about 6 months. It makes the car really easy to wash and the after wash shine is immaculate.
Over the top of this I apply Optimum Car Wax after each wash. It sounds like a bit of a Halford's bargain bin special but its imported from the USA and is well respected in detailing circles. Its a spray wax/sealant combination and you'd be pretty amazed at the results it gives you on a light coloured car. This wax builds depth and clarity with each application, I'm very impressed with it.
If you get the preparation right, your car will come up like new after nothing more than a wash.
I use the following places for detailing products, may be of some use to you:
http://www.carsparkle.com
http://www.polishedbliss.co.uk (some excellent guides on this site).
http://www.motorgeek.co.uk
http://www.cleanandshiny.co.uk/