Terracotta Plaques
This page covers plaques
and other decoration using terracotta
bricks, common in Victorian and Edwardian houses.
Terracotta was usually made in Staffordshire.
Examples are:

terracotta with glazed brick border

Edwardian festoon design

Edwardian, used in frieze

brick panel (Edwardian, Bromley)

late Victorian

stylised floral

floral brick; border is possibly terracotta