Staying at Paulo's place is just like staying in your best mate's apartment.
He has a projector and sound system, which is a great way to watch films.
If you've forgotten anything it will be available in the apartment.
There are several Polski Sklep within walking distance (Hanger Lane) where you can buy essentials. For Sainsbury's you'll probably need a car. Although Paulo will probably offer to buy anything you need on your first night.