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In the case of this object this can be done by:
Writing to Mr James Carleton at Farrer & Co, 66 Lincolns Inn Fields, London, Wc2a 3lh
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Reporting An Access Error to the HMRC:
Two Italian alabaster pedestals
Maker:  Maker Unknown
Description: 
Two Italian alabaster pedestals, with moulded circular tops, the vertical sides carved in relief with leaves, scrolls and husks hanging from ribbons, on matted gilded ground, with foliate bands below, on square bases - 12in. high, 15th century
ID:  78677