200-206 Gladstone Bag.

200. There Once Was an Ugly Duckling - here seen in working condition, London, Brighton & South Coast Railway Stroudley B1 Class 0-4-2 No. 214, Gladstone, the first of the 'Gladstone' class of 36 express passenger engines.  Preserved today in the National Railway Museum, York with a preservation story going back to the 1927 when it was withdrawn for restoration and preservation by the Stephenson Locomotive Society.  It had the number 618 from 1911 when four engines were scrapped (215-220). The three survivors became 618-620 to make way for a new class, but the war intervened, the engines didn't materialise, and the original numbers were restored.
In this photograph, circulated by O J Morris) it has the painted number and name typical of the early 1920s

201. But a touch of make-up goes a long way... The following (except for 203) appear to be a set of five on unmarked postcards. Photograph appears to be W J Reynolds (see comment below).  Geoff: 201 : J.N. Maskelyne (left), on Saturday 21st May 1927 during an SLS visit to Battersea. 

202. As preserved and presented in 1927. (W J Reynolds) Geoff: 202 : Headcode No 69 Victoria and Brighton, via Crystal Palace (Specials only), which went out of use in June 1910 - so, just for decoration.

203. The livery seems to be a different colour, a film distortion (F Moore/Locomotive Publishing Co)

204. Gladstone with fellow Class B1 LBSC No 197. (W J Reynolds).  If it is 1927, then it still has its abbreviated LBSC lettering on the tender, typical of the early 1920s. It has no name (historically it bore the name Jonas Levy) but has a brass number cartouch on the cab unlike picture 200. It has a crude number painted on the tender, in the Southern tradition. We know that this engine did receive the Southern livery (a photograph appears on SEmG). It was withdrawn August 1932.
From Geoff: 204 : "An F. Moore photograph of the great day, 23 May 1927, when Gladstone was hauled out of one of the Battersea shed roundhouses by fellow class member No 197 (once named Jonas Levy) and still appropriately with LBSC on its tender."   Quoted from The Brighton Circular Winter 2009. But: see note to 201. F. Moore is the photograph distributor (later known as The Locomotive Publishing Co.) rather than the photographer. 

This photo (below) is actually the F Moore photo - notice the effect of different film on the livery, which makes sense of this series of photos (see also Moore's picture at 203). Moore's vantage point is closer and slightly different, judging by the semaphore signals in the background. The number on 197's tender is not so easily visible.

205. Photo by W J Reynolds.  Geoff: 205 : Appears to be Nine Elms, so on or about 14th May 1927 when she was exhibited at Waterloo with E850.

206. Photo by W J Reynolds.