In addition to the preceding cocktail recipe, here a few more, just in case you're feeling particularly Churchillian.
There is, of course, the Churchill Cocktail, first mentioned in Esquire, 1939. It's reputed to have been his favorite cocktail at the Savoy hotel's American Bar.
Strain into a chilled cocktail glass:
1 1/2 oz Scotch
1/2 oz Cointreau
1/2 oz Italian (sweet) vermouth
1/2 oz lime juice
There's also a cocktail invented by Sir Winston, according to the 1965 Esquire Party Book:
Strain into a chilled champagne glass:
3 oz brandy
1 1/2 oz champagne
dash of Cointreau