Enjoy a delicious english afternoon tea as you sail by londons world famous sights on this 15 hour sightseeing cruise along the thames river board your sightseeing boat and gaze at passing landmarks such as big ben the houses of parliament the shard and tower of london as you savor everything from dainty sandwiches and cakes to scones smothered in clotted cream and preserves all complemented by freshly brewed tea and coffee from the pot to up the luxury upgrade to enjoy an included glass