The gardens are not large, but attractively planted.
Beyond the gardens are parkland with a fine and sizeable herd of cattle.
The Hall is an offshoot of the National Portrait Gallery. It contains, for example, part of the series of portraits of the Kit-Kat club, the rest of which feature in a gallery in the NPG in London. The NPG has also lent to the Hall a series of royal portraits, including the large and colourful painting of the royal family seen above, all circling the late Queen Mother.
All in all a nice diversion, but would have been even nicer on a day other than a Bank Holiday as the place was clearly on the itinerary of every local young family desperate to give their youngest members a place to run around in.