The attention to detail in this grate, such as the unusual feature of the flat back of the top finials, and the shape of the tapering supports, would suggest the involvement of an architect in its design. This may have been Henry Holland who was employed by Samuel Whitbread (founder of the brewery) to remodel the family home Southill, Bedfordshire, in 1795. Certainly the shape of the tapering supports is very similar to those on a commode at Southill and spiral fluting is used on the pilasters of the chimneypiece in the yellow room at Althorp remodelled by Holland in 1790.
Dorothy Stroud, Henry Holland 1966, figs. 105 & 78.