Not all English Heritage properties are open yet, and those that are require pre-booking via their website.
If you, or any of your party have a new persistant cough, or develop a fever of 38C, we would instead advise you to use the NHS's dedicated website for professional advice.
Finest example in Britain of Carthusian monastery or charter house founded in 1398. Remains of monks individual 2-storey cells, 1 reconstructed and furnished with a medieval herb garden. The monastic guesthouse was incorporated into 2 later houses: a 17thC manor and a larger house in 1900-01 containing an introductory exhibition and gift shop. The gardens are presently being restored to a Victorian theme.