The Romans are first credited with making bricks in Britain. Their bricks were usually a red colour and often black inside. They look different to modern bricks because they were made by hand and were lots of different shapes and styles. Some look like tiles and others look like long thin bricks the length of one or two feet. Plenty of Roman bricks have been discovered in the Peterborough area, many of which would have been made in the Normangate Field area south of Castor and Ailsworth. If you want to see Roman bricks in a building, a visit to the Jewry Wall in Leicester is recommended.
The image is of local, but not Roman, bricks.