Slimming World’s BBQ pulled chicken burger and chips

Name: Slimming World’s BBQ pulled chicken burger and chips
Cook time: 1 h
Total time: 1 h
Cuisine: American
Ingredients: 2 tbsp rice vinegar; 1 tbsp dark soy sauce; 1 tbsp Worcestershire sauce; 1 level tbsp runny honey; 2 tbsp passata; 1 garlic clove, crushed; ½ tsp freshly ground black pepper; ½ tsp celery salt; ½ tsp ground coriander; ½ tsp chilli powder; 3 tsp barbecue seasoning (we used Schwartz Classic BBQ Herb & Spice Blend); 8 skinless and boneless chicken thighs (not the frozen variety); 1 level tsp extra-light mayonnaise; 2 tsp fat free natural fromage frais; 60g wholemeal roll, halved; lettuce, sliced tomato and sliced red onion; 250g floury potatoes, peeled and cut into thin fries; low calorie cooking spray; salt and freshly ground black pepper