172-190 Later H15s and S15s.

In 1924, production of H15s restarted, including the rebuilding of 330-334 former F13s. The running boards are now level and not stepped. These three classes were a family with many interchangeable parts - H15 and S15 as mixed traffic, and N15 as passenger engines. At this stage the N15s were not given Arthurian names.

172. Southern 334, , Class H15 rebuilt from class F13.

173. Southern E521, Class H15

174 Southern E473, Class H15 (Locomotive Publishing Co)

 175. Southern E521, Class H15

 176. Southern E476, Class H15

177. Southern E522, Class H15.

178. Southern E334 wearing 1930s blinkers. 330-334 were rebuilt from Class F13s.

179. Southern E 522 Class H15.

180. Southern E473 Class H15.

181. Southern E476 Class H15.

 182. Southern E330, rebuilt from an F13.

183. Southern E524 Class H15.

184. LSWR 498 Class S15, around 1920.

185. LSWR 499, Class S15 (Locomotive Magazine)

186. LSWR 507, Class S15 (O J Morris)

187. LSWR 508, Class S15 (Locomotive Publishing Co)

188. LSWR 507, Class S15  (Locomotive Publishing Co)

189. LSWR 825, Class S15 (Locomotive Publishing Co)

190. LSWR 833, Class S15 (F Moore's Railway Photographs)

To be moved to King Arthur post   later

 Southern E778  Sir Pelleas (Locomotive Publishing Co)

Southern E453 King Arthur. (Locomotive Publishing Co)

Southern E782  Sir Brian.

Southern E764 Sir Gawain (F Moore's Railway Photographs)