The Great Western Railway (GWR) 4500 Class or Small Prairie is a class of steam locomotive. They are 2-6-2T type. A total of 75 were built; 55 were built in four batches between 1906 and 1915. A fifth batch of 20 locos was built in 1924, during Collett's tenure at Swindon. The first two batches were originally numbered 2161ââ¬â2190 but were renumbered 4500ââ¬â4529 during 1912. The first batch (2161ââ¬â2180) is significant in that it was the last batch of locos built at Stafford Road Works, Wolverhampton. Of this batch 2168 (as 4507) was the last Wolverhampton-built loco to remain in service with BR, not being withdrawn until 1963. The final two batches built were nos. 4530-4554 in 1913-15 and nos. 4555-4574 in 1924. The 4575 Class was a later development with larger side tanks. Number 4566 left Woodham Brothers in August 1970 and currently is in service on the Severn Valley Railway (In GWR Green).
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