No fewer than six of this class of thirty-five engines are still in existence, but not Kingfisher which was withdrawn from service in 1966 and sold to a scrap merchant. One of the six is in Canada, one in the USA, and four in Britain, including Mallard in the National Railway Museum at York.
I like Trishanne's colour work, but I think the top of the tender, next to the coal and above the beading above the driver's head would have been black, as would the roof of the cab. The number '24' would have been chrome-plated (silver) rather than polished brass, but I'm not sure about the oval plate below the number, or the cab window-frame.
As for Mr Bee getting the sack because he took his little nephew onto the footplate, maybe this was his last day at work before retirement. I'd say the date must be 1948, because camera films were unobtainable by the general public until then.
Harry.