All this week we are inviting you to listen out for a clip of a television or film theme tune, this will be one from the past, present and future. On hearing this clip you must call 0845 106 2 108 to be in with your chance to win.

You could win a fantastic 32” LCD TV or a family Pass including pre-booked tickets to the Gallery, a Family IMAX ticket and a goodie bag including lunch vouchers.

So tune in all this week and switch on this summer with the National Museum of Photography, Film and Television.