Here's what Mr W Pedia's excellent encyclopaedia says about them:
"Two "Pugs" have survived into preservation, both through the Lancashire and Yorkshire Railway Trust.
L&YR No. 19 (LMS No. 11243), built in 1910, was sold by the LMS into industry in 1931 and was acquired by the Trust from the United Glass Bottle Manufacturers Ltd. at Charlton in 1967. It was found to be in poor mechanical condition and was later placed on static display pending overhaul, most recently at the Ribble Steam Railway. In early 2020 the locomotive moved to the East Lancashire Railway in Bury. Following an inspection of its condition, it was decided to proceed with restoring it to working order. This restoration is now in progress.
L&YR No. 68 (LMS No. 11218, BR No. 51218), built in 1901, was purchased directly from British Rail in 1964 and moved to the Keighley & Worth Valley Railway in January 1965. The locomotive was re-tubed in 1974 and took part in the Stockton & Darlington Railway cavalcade that year. The locomotive was overhauled again in 1997 and continued in service, albeit mostly as a shunting locomotive due to its low power, until its boiler tubes required replacement in 2006. The locomotive carried its original identity of L&YR 68 from 2004 onwards, but has been cosmetically restored in 2018 to 51218 for the K&WVR's 50th Anniversary Gala, reflecting that 51218 was the first loco to arrive in 1965. Overhaul is now under consideration at Haworth on the K&WVR as the restoration of 0-6-0ST No. 752 has now been completed at the East Lancashire Railway."
I, too, saw No. 51218 at Oxenhope last month.
