You will need to contact the owner's representative to arrange access.
In the case of this object this can be done by:
Writing to A E Millson at Royds Llp, 65 Carter Lane, London, Ec4v 5hf
Reporting A Data Error:
Reporting An Access Error to the HMRC:
A good Hispano-Moresque circular dish
Maker:  Maker Unknown
Description: 
A good Hispano-Moresque circular dish, late 16th century, boldly painted in copper lustre with a large stylised bird among fern fronds, 15 1/2in.
ID:  62447
THIS ARTWORK IS LOCATED IN:
DorsetThis may be one of a selection of objects that can be seen (by guided tour) as part of the Heritage Open Days Scheme operated by English Heritage in England. However, as numbers are limited, entry is by pre-booked ticket only. For further details and opening times see the attached link. At all other times access is by appointment. For further details, pre-booked tickets and appointments please write to John Montagu or Anthea Archdale at Mapperton House, Beaminster, Dorset, DT8 3NR. This object is available for loan to public collections for special exhibitions in the UK.