Today I went to Shildon a lovely sunny day, I took photo but this one I don't know what it is, I think is Hudswell Clarke or Avonside and other photo 3131 (SR 11179) is this in British Rail Livery or Southern Rail livery?
It was previously located at the Middleton Railway, but has since been moved to Shildon for restoration:http://c9425687.myzen.co.uk/MRT2/index.php/enthusiasts/our-engines-and-stock#CONWAY
This design of locomotive dates back to around 1917 when Manning, Wardle and Co built six examples for Stewarts and Lloyds at Corby. When Manning, Wardle and Co. closed in 1927, their goodwill and drawings were passed to Kitson & Company who went on to build another batch of seven locomotives, including 'Conway'. After closure of Kitson's four more were still produced, this time at Robert Stephenson Hawthornes of Darlington.
Likewise, Peckett 2103, an 0-4-0 saddle tank, has moved to Ribble Steam Railway on a similar deal.