A very useful Marks & Spencers Simply Food shop, located in the Reading rail station. Along with the usual groceries and some spirits, they have a good selection of prepared "ready-to-eat" meals and "ready-to-heat" stuff too. If you look high and low, there are some decent bargains hiding in the shelves, like 2 for £1 deals.
They're open until 22:00 every night, which is helpful when you arrive late and don't feel like cooking a big deal or stopping in a restaurant.
No trolleys, but they have baskets you can fill up with stuff. read more