1862 - partnership between Thomas Aveling (1824-1882) and Richard Thomas Porter; 1881- control of Aveling & Porter handed over to Thomas Lake Aveling (1856-1931); 1895- limited company; c1932 merged with Barford and Perkins Ltd to become Aveling Barford Ltd, Aveling, Barford and Perkins Sales Ltd. and works moved to Grantham