All credit to toyshop chain, the Early Learning Centre, who are leading the fight back against anthropomorphic tank engines with this recognisable A4 in garter blue:

A very timely suggestion. The Fact Compiler is just popping into town...
UPDATE: Captain Deltic adds...
I should have mentioned for those of the Stanier persuasion there is also a stream-lined Coronation in maroon livery.
However, grand-daughter naturally preferred Sir Nigel's design.