Her family lives in London, not Kent. And why would she stay by herself in an empty house - they do not film on a bank holiday - when the person she lives with and his dog are enjoying the country house?I think she was only suggesting that maybe Zawe is working in London with the rest of the Marvels cast or that she might be spending the bank holiday weekend with her family in Kent. Neither of those things are impossible, along with her maybe spending time with Tom in Hampshire.