rightmove.co.uk
Excellent selection of properties to buy throughout the entire UK on one of the top property sale sites. Also includes information on finding an agent plus tips for buyers and sellers.

asserta home
One of the UK's top home-buying services with thousands of listings to buy or rent. Also includes buying and selling tips plus extensive mortgage information.

Propertyfinder.co.uk
On of the largest property databases in the UK with thousands of homes for sale or rent.

Fish4homes
Extensive list of properties for sale plus an excellent list of rentals also. Includes directory of estate agents plus information on mortgages, moving, insurance and legal plus more.

The London Property News
Online version of the popular London Property News magazine. One of the largest sources of information on London property for sale or rent on the internet.

wheretolive
Good listing of properties to buy or rent throughout the UK. Includes information on home auctions, mortgages and general advice.