 The brickworks are located immediately to the North of the Bristol and South Wales Union Railway, then under construction through the Severn Tunnel.By the end of 1883, the tunnel's enormous demand for bricks with which to line the tunnel was taking 100,000 bricks per month from Cattybrook.This was only a small proportion of the tunnel's need though and three other brickworks were supplying the tunnel, 1,200,000 per month in total.