They were numbered in sequence as 322–327, with No. 323 having exchanged numbers with No. 359, No. 325 with No.337 and No. 327 with No. 366.
Rebuilding
From 1918, all apart from No. 324 became pannier tanks when they were reboilered with Belpaire fireboxes. No. 322 was the only one ever to have a fully enclosed cab.
Use
They were principally stationed in the Birmingham/Wolverhampton area and at Stourbridge, and including their previous existence as tender engines, all ran over a million miles up to their withdrawal between 1921 and 1932.[1]
le Fleming, H. M. (April 1958). White, D. E. (ed.). The Locomotives of the Great Western Railway, part five: Six-coupled Tank Engines. RCTS. ISBN0-901115-35-5. OCLC500544510.