I'd say these are quintessentially English:
Chavs
Elizabeth Duke at Argos
The Jeremy Kyle Show
Chips with cheese and gravy
Naming kids after brand names (Levi, Chanel, etc.)
'White Van' men
Page 3 of The Sun
The royal family (even though they're not English)
Les Dennis
Laying claim to foreign athletes (Lennox Lewis, Greg Rusedski, Linford Christie, John Barnes etc)
'Land of Hope and Glory'
The half-American 'proper Englishman' Winston Churchill
And on the plus side:
The best football league in the world
Shaun Ryder
The Smiths