Standard genealogical data is available from many sources. The major problem with most of this data is is usually a snapshot of an individual at a certain point in time. Relationships between events and individuals is not always obvious from this data except in the case of cencus data. Over the years, the collection and publication of data has improved and meets some of the needs of geneologists.
General Geneology Resources
Genuki – the best genelogical resource by far
British Genealogy – Commercial
The Family History Project
Getting cencus Information
Various Years
Genealogy Supplies – shop online CD data
The Genealogist – online name indexes
Ancestry.co.uk
FreeCen – Free but limited1881
Family Search – another excellent resource
1901
1901 Census from the National Archives
Birth, Marriages etc Records
Pre 1837
Family Search – excellent resource
FreeReg (no data online yet)Post 1836
BMD Index – Commercial
1837 Online – Commercial
FreeBMD – weak in some years and mostly done up to 1914
Family History Societies – UK
Federation of Family History Societies (with contact details)
Genuki (links to websites)
Family Tree Sites – UK
yDNA Data
The vast majority of sites only allow access to customers so are of limited use.