Table 1 Menu categories with examples of swaps offered, % swaps available, means (range) of energy content

Main hot meals (n = 3)

1. Beef lasagne

2. Haddock with crushed potatoes, peas and broccoli

3.Moroccan style tomato & chickpea pie, mixed leaf salad

1.Beef lasagne, mixed leaf salad (680 kcal)

1.Haddock with crushed potatoes, peas and broccoli 415 kcal) 2. Beef, Horseradish & rocket sandwich (336 kcal)

100% (3/3)

595 kcal (415–831 kcal)

Jacket potatoes (n = 10)

1.Jacket potato with baked beans & cheese

2. Jacket potato with tuna mayo

1.Jacket potato with baked beans & cheese (633 kcal)

1. Jacket potato with baked beans (384 kcal)

80% (8/10)

478 kcal (275–728 kcal)

Soup & sandwiches (n = 15)

1. Bacon Lettuce Tomato sandwich

2. Chicken & stuffing sandwich

3.Tomato and basil soup

1.Bacon Lettuce Tomato sandwich (355 kcal)

1. Smoked ham & mustard sandwich (262 kcal)

80% (12/15)

350 kcal (235- 449 kcal)

Sweet snacks (n = 18)

1. Chocolate brownie

2.Yoghurt

3.Fruit salad

1.Chocolate brownie (283 kcal)

1.Broderick’s Chocolatey Solid Brick (217 kcal)

72% (13/18)

215 kcal (74- 471 kcal)

Savoury snacks (n = 20)

1.McCoys crisps

2.Eat real chips

3.Propercorn Popcorn

1.McCoys Flame Grilled Steak (252 kcal)

1.Popchips BBQ (97 kcal)

75% (15/20)

173 kcal (87- 261 kcal)

Drinks (n = 18)

1.Oasis Summer Fruits

2.Coca-cola

3.Water

1. Oasis Summer Fruits (86 kcal)

1. Oasis Summer Fruits Zero (17 kcal)

50% (9/18)

56 kcal (0–210 kcal)