Images of England
Images of England is an English Heritage initiative and part of the National Monuments Record. It contains over 300,000 photographic records of England's built heritage. A basic search is freely available but you will need to register for 'Advanced' searching. As well as houses, churches and bridges, it includes lamp posts and lavatories, phone boxes, mile stones and gravestones.
Researching Historic Buildings in the British isles
Search the 'Style' section for introductions to the different architectural styles in the British Isles ranging from Art Noveau to Romanesque.Suggestions for further reading and primary sources are included too.
RIBA (Royal Institute of British Architects)
Via the "RIBA Library" link, search the vast online catalogue for references to articles. The site also includes information about architectural events and details about RIBA itself, including how to find an architect and information on architecture as a career.
RIBA Online Directories
Find chartered practices in the UK and individual members of RIBA (Royal Institute of British Architects).
http://www.architecture.com/ FindAnArchitect/ FAAHome.aspx