Marks Hall, Coggeshall, Essex. Owned by the Marks Hall Estate, a registered charity.
Free public access to public footpaths through the estate otherwise a charge is made for the Gardens and Arboretum and the woodland in general.
See www.markshall.org.uk for opening hours. Note: it is closed on non-Bank-holiday Mondays.
The estate is host to colonies of re-introduced Silver-washed Fritillaries and Purple Emperors.