RHS Wisley is also fantastic. Unfortunately slightly more difficult to get to; you really need to drive there. Agreed about the riverboats. Tried the Thames cl

RHS Wisley is also fantastic. Unfortunately slightly more difficult to get to; you really need to drive there. Agreed about the riverboats. Tried the Thames clippers for the first time a few weeks ago. They're delightfully empty during weekdays and serve drinks and snacks on board.