Richard Barton kindly pointed out that the loco was NOT a contractors loco as I had stated, but one of two Sharp Stewart locomotives, of this design, purchased by the London Brighton and South Coast Railway (LBSCR). Thank you Richard.
Alan Bell’s Model Railway – Langstone Train Ferry Quayside
Loading Coal into carts at the end of the Quay. The Sharp Stewart 2-4-0T steam engine ‘Hayling Island’ is to the left of centre.