Look what I have in the roofspace! A 1981 Matchbox Superkings Leyland Titan omnibus in Royal Wedding livery.
Worth about ten pence on eBay, but conveys precious memories for me: I still remember the hiding my mum gave me when I lost the box for it.
The white plastic tab abaft 'their' faces operates the centre-body doors. Sophisticated stuff. The Superkings were a range of more accurate, larger-scale die-cast vehicles with low friction and given their expense were usually only received at Christmas or on special occasions.