Headed off to London to catch a boat down the Thames to Greenwich. Needed to test our sea legs out for the river cruise in a weeks time. We knew the river was tidal but did not realise how big the difference would be between low and high tide - a lot. Greenwich is home to GMT, the National Maritime Museum, Queen's House, Cutty Sark, Royal Observatory and much more. To do it all properly in a day would be impossible so we only touched on a bit of it especially as ...