Thomas Roberts was a designer and craftsman active in England, particularly in Oxford, in the mid- to late-18th century.
Roberts is noted especially for his ornamental plasterwork, much of which was rococo in style.
Sources:
Beard, Geoffrey, Decorative Plasterwork in Great Britain
(London: Phaidon, 1975)
White, Roger and Robin Darwall-Smith, The Architectural Drawings of Magdalen College: A Catalogue (Oxford: Oxford University Press, 2001) p.11.