Possible Clues:

• Country lacking nothing, cause of Brexit?
• James____ ( Titanic producer)
• Name after James and before Diaz
• "Titanic" director James
• GB PM
• Brown's follower
• David —, prime minister
• PM who followed two Labour PMs
• C, half-cut Bush, for example, gatecrashing his party?
• James --, director of the film 'Titanic'