I well remember the Green Dragon-you would get an enormous bag of chips for threepence there!!
My Dad was also customs on North side and those very nice waterguard chaps-maybe you Mr Oleo Strut-would often take me out with them if they were rummaging a Stratocruiser/Connie or DC-7 etc if I was hanging about at week ends -spotting-when Dad was on overtime.
They had usually only just arrived and we would have first pickings on some lovely food still in the galley. BOAC being the best-of course!!