Famously "as it said on the Tin" - a glass of Prosecco, 3 enjoyable sandwiches, 2 scones with ample cream and jam, and 3 cakes, per person with a pot of tea to...
Open-top bus 48h or 72h ticket with cruise - Adult or Child
This tour was awesome and I highly recommend it. Even if you are a local these buses are a great way of getting around London and surrounding districts.