The Taff Vale Railway O2 class was a class of 0-6-2T steam tank locomotives designed by Tom Hurry Riches

Tom Hurry Riches

Tom Hurry Riches was a British engineer who became the Locomotive Superintendent of the Taff Vale Railway in October 1873, and held the post until his death. At the time of his appointment, he was the youngest locomotive superintendent in Britain....

 and introduced to the Taff Vale Railway

Taff Vale Railway

The Taff Vale Railway is a railway in Glamorgan, South Wales, and is one of the oldest in Wales. It operated as an independent company from 1836 until 1922, when it became a constituent company of the Great Western Railway...

 in 1899.

Numbering

Year	Quantity	Builder	Serial Numbers	TVR Numbers	GWR numbers	Notes
1899	9	Neilson, Reid & Co.	5406, 5408, 5410–5416	82, 85, 84, 32, 83, 81, 31, 66, 44	423, 426, 425, 413, 424, 421, 412, 419, 415

Withdrawal and disposal

All were withdrawn from traffic between 1926 and 1928. One locomotive, GWR 426 (TVR 85) was sold to the National Coal Board

National Coal Board

The National Coal Board was the statutory corporation created to run the nationalised coal mining industry in the United Kingdom. Set up under the Coal Industry Nationalisation Act 1946, it took over the mines on "vesting day", 1 January 1947...

 and used at their Philadelphia Colliery, numbered 52. It was subsequently saved for preservation, and is based at the Keighley and Worth Valley Railway

Keighley and Worth Valley Railway

The Keighley and Worth Valley Railway is a long branch line that served mills and villages in the Worth Valley and is now a heritage railway line in West Yorkshire, England. It runs from Keighley to Oxenhope. It connects to the national rail network line at Keighley railway station...

.