Supercar Keele Street  Pottery
Keele pottery in Staffordshire produced a range of Supercar items.
 I'm not sure of the full range but displayed are three different mugs, 2 versions of  the egg cup, painted and unpainted, 
a plate, 2 side plates and 2 cereal bowls.
And just to prove that if you wait long enough its all out there somewhere a lady called Aileen sent me  picture of the Supercar Breakfast Set she was given as a gift when she was born in 1963.
Still boxed and unused