 CDP plunged in under its new managing director Frank Lowe (later Sir Frank), and set the tone for what is now viewed as a golden creative period in British advertising.Clients included Harvey’s Bristol Cream, Bird’s Eye, Parker pens, Fiat, Ford, Acrilan, Pretty Polly and Ronson.Campaign slogans which entered the national consciousness include "Happiness is a cigar called Hamlet" and "Land Rover.