Time to put up all the useful websites that have allowed such a wealth of research to be so easily accessible!
Is a good source of initial research. It gives an insight into other areas of research, and less niche information (thus less time researching) PLUS YOU MIGHT FIND SOME GOOD EXTERNAL SOURCES!
VISION OF BRITAIN http://www.visionofbritain.org.uk MAP QUOTE CENSUS WRITINGS
Amazing array of maps across many decades, with quotes, census statistics through the ages and historical writings on practically every settlement in Britain!
FADEN’S MAP OF NORFOLK http://www.fadensmapofnorfolk.co.uk MAP
The 1794 William Faden Map of Norfolk, plus the geo-corrected redrawn version, ALL DOWNLOADABLE (per tile of course)
HAPPING HISTORY INDEX http://www.wilcox53.freeserve.co.uk/ HISTORY
Pretty much a full history (emphasis at Medieval)
GENUKI http://www.genuki.org.uk/ QUOTE WRITINGS
A vague knowledge of the UK and Ireland (aimed more at quotes/writings has some obscure info, interesting!)
EDINA OPENSTREAM http://openstream.edina.ac.uk/ MAP
Quick EDINA DIGIMAP map search and look at areas without having to have a login!
MORE SPECIFIC and pages
Their own town website is SO RIDICULOUSLY AMAZINGLY USEFUL! actually.
Overview of coastal erosion (pictorial)
FRANCIS FIRTH http://www.francisfrith.com/
Worth a mention because many old images are available to view (plus you might find good search terms for google)
This is my end of the research (mostly aimed at Happisburgh), hope you find it helpful!