The arms are those of Sir Henry Bridgeman (1725-1800) who succeeded his father as 5th Bt. on 25 July 1764 and was created Baron Bradford on 13 August 1794.
A related silver-gilt teapot supported on a nearly identical stand, also by Fogelberg and Gilbert and hallmarked for 1784, is in the collection of the Victoria and Albert Museum and is illustrated in Robert Rowe, Adam Silver, number 73. The design of that teapot is attributed to the Neoclassical Architect Sir William Chambers (1726-1796).
The designs of the Swedish born Sir William, possibly most famous as the architect of Somerset House in London, were also either used by or the inspiration for silver by other important late 18th century silversmiths such as Matthew Boulton, Frederick Kandler and the partnership of Sharp and Smith.