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 Nigel Shields at The Estate Office, Althorp, Northampton, Northamptonshire, Nn7 4hq
Emailing Nigel Shields:
Reporting A Data Error:
Reporting An Access Error to the HMRC:
A Delft blue and white glazed pottery circular dish
Maker:  Maker Unknown
A Delft blue and white glazed pottery circular dish, the centre painted with a flowering plant, within five panels of scrolling foliage on a blue foliate ground, 18th century, 13 1/2in. diameter (in Garden Lobby China Cabinet, bottom shelf).
Currently kept at: Althorp
THIS ARTWORK IS LOCATED IN:Northamptonshire
As per Althorp website. At other times by appointment through the contact point.