Downstream of St.Katherines , there is only really Limehouse and Galleons Point
( North Woolwich ) but I wouldn't really recommend either as a pub rich stop over .
You might consider Chatham Marina on the Medway , which does indeed have fuel ( both diesel & petrol ) , a pub/hotel very close by , and probably more drinking holes within striking distance . The " Historic Dockyard " next door may also be worth a visit . Checkout the Medway for speed restrictions before you charge up there ! I'm sure some locals can advise further .