Immigration and asylum law
Electronic Immigration Network
Site specialising in the provision of information on immigration and refugee law via the Internet: best collection of UK caselaw on the web. Some material free, most is for paying members.
This site is maintained by Colin Yeo, Barrister at Garden Court Chambers and provides updates and commentary on immigration and asylum cases. There is a subscription only option, but the free material is greatly valued by practitioners in the field and appears to be updated several times a week.
UK Visas and Immigration
Detailed site with many official materials, forms and leaflets and links to policy and news. Of particular use is the section on immigration law and operational guidance: https://www.gov.uk/topic/immigration-operational-guidance