1st Tray. Poached egg, Toast, Jam, Butter, Coffee and milk, Jug of cold milk, Cold Chicken or Meat.Daily Routines has an account of Churchill's, uhh, daily routine. And if you're wondering about orange squash, it's a beverage.
2nd Tray. Grapefruit, Sugar Bowl, Glass orange squash (ice), Whisky soda.
Wash hands, cigar.
Churchill's hand-written breakfast menu revealed (Daily Mail)