Aged only 24, in 1941 Brenda Heimann, a London secretary, joins up as a Wren. Little does she imagine that she will work in the tunnels under the white cliffs of Dover. Eight months' preparation for D-Day in Inverness culminates in Brenda being driven all along the south coast of England from Portsmouth to Dover delivering the final sealed instructions to commanders taking part in the Invasion of Normandy. Stationed in Caserta, near Naples, Brenda...