Port Cities is a new set of linked websites covering
various port cities around Britain.
Amongst its coverage, it includes an article on
Flour milling and the Port of London.
Lots of individual records show up if you search for either windmill or mill - you can do this at the
overall site which searches all port cities at once, but you
get better presentation of results (with thumbnails) if you search at the individual port's sites.
Particularly rewarding is
the Liverpool site which
includes many images of windmills in the area.