Dog Star
Western Thunderer
... Not going to.argue with Adam's comment - possible that the meat vans were wending their way to Smithfield.... BR standard insulated meat vans (just 250 built), at least three of them. Now, they could be transporting meat - that's probably likely, in fact - but seeing as they're not a million miles from Park Royal, and many were used in beer traffic, lettered 'Ale', the load might well be Guinness