As the title says this thread is for links to useful sites regarding the Supermarine Spitfire. Here are a few I find useful and I'll add more in the future.

1) The following link is to the Variants & Technology section of The Spitfire Site: http://spitfiresite.com/category/50-reference/variants-technology

2) Spitfire Aircraft Production, an impressive site that attempts to record all the serials, production blocks and unit allocations of the Spitfire: http://www.airhistory.org.uk/spitfire/

3) The 'All The spitfire questions you want to ask' thread at Britmodeller. In amongst the post on plastics and modelling jargon there's a lot of great detail and technical info, much of it posted by the late Edgar Brooks (a highly regarded Spitfire researcher): http://www.britmodeller.com/forums/index.php?/topic/234952528-all-the-spitfire-questions-you-want-to-ask-here/

Cheers,

HB