The term 'British John' can be broken down into two crossword solutions: LOO (3 letters) and ELTON (5 letters). The term 'LOO' is a British slang term for a toilet, while 'ELTON' is a reference to the British singer-songwriter Elton John. Elton John is one of the most successful musicians of all time, having sold over 300 million records worldwide. He is also known for his flamboyant stage presence and outrageous costumes.