It is a very lucky thing to have a good place to live and a good landlord when you go abroad. The help you give in life will make your life relatively smooth, and you will not put too much energy on these things, and you will concentrate on studying. You should thank him well and give him a small gift. Here are some suggestions for you:
1. A middle-aged foreigner should be a very conservative British person. It is estimated that he will not come to China. You can give him some Chinese green tea or some Chinese snacks. He will definitely like it.
2. Give him some gifts with Chinese characteristics, such as Chinese paintings, fans, or Chinese knots, which are also good as decorations in his home.
3. Give him a creative gift. You can make a real-life doll of the landlord wearing a Tang suit. He will definitely be very surprised.