For inexpensive fast food costing less than £20, try The Mill coffee shop. It is located near The Sorrento in the riverside district.
[['The Mill', 'eatType', 'coffee shop'], ['The Mill', 'food', 'Fast food'], ['The Mill', 'priceRange', 'less than £20'], ['The Mill', 'area', 'riverside'], ['The Mill', 'near', 'The Sorrento']]