With regards to the RNAS in East Anglia I can recommend two books - 'Seaplanes-Felixstowe' by Gordon Kinsey published by Terence Dalton 1978 and 'The Story of a North Sea Air Station' (Great Yarmouth) by C.F. Snowden Gamble published by the OUP in 1928 with a more recent reissue also available. Both these titles can be found on ABE BOOKS the former being very much cheaper than the latter classic !