YOU SAID:

When do I have to come back to London?

INTO JAPANESE

いつロンドンに戻らなければならないのですか？

BACK INTO ENGLISH

When do I have to go back to London?

INTO JAPANESE

いつロンドンに戻る必要がありますか？

BACK INTO ENGLISH

When do I need to return to London?

INTO JAPANESE

いつロンドンに戻る必要がありますか？

BACK INTO ENGLISH

When do I need to return to London?