Well England is not Scotland or Wales or Ireland - hence the name Great Britain and now United Kingdom. The Union Jack has three flags in one to symbolise unity.
English culture - drinking! Also fighting and swearing. And puddings and cakes and custard on everything except clog dancing. Tea before anything else when you go round someone’s house. Apologising whenever somebody pushes / elbows / interrupts you. Or whenever somebody notices you exist.
Awful folk music, frequently involving somebody asking their father to dig their grave. The Proms, pop, wild poetry and plenty of it. Community choirs.
Ridiculous sports like rugby and cricket and netball.
Literary novels about the difficulties of being a woman, often written by women. Shakespeare, Milton, Dickens, Agatha Christie, JKR, Hilary Mantel.
Actors and artists which we export mightily. Public parks and free museums.
Obsession with the weather and complete inability to make any adjustment to deal with it. Beautiful countryside made of mainly mud but sometimes leafy and flowery and blue skied. Coasts of cliffs and pebbles and sand. Cold water swimming and obsessive love of our pets.
Global language of infinite local variety, dialect and accent.
Religious tolerance for the last 4 centuries.
Like all countries, England has lots of culture. Like all cultures it is not exclusive it just is what it is and not something else.