6634 is a 5600 (56xx) class 0-6-2T. The class were designed by Collett and built between 1924 and 1928. 6634 was built at Swindon Works and completed in August 1928. She worked for 35 Years and 8 months before finally being withdrawn in June 1964. 6634 is located at Peak Rail and is owned by Pete Waterman. She is currently under restoration.
Pete also owns fellow GWR tank locomotives 5553, a 4575 2-6-2T which is also located at Peak Rail (along with sister engine 4588) and 5224, a 5205 2-8-0T (which left the famous Woodham Brother's scrapyard in October 1978.) Like 6634 and 5553, 5224 is located at Peak Rail.
9 of the class are preserved including 6697 which is on static display at Didcot Railway Centre.