Best cheeseburgers

Name: Best cheeseburgers
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Cuisine: American
Ingredients: 450g beef mince (ideally 15-20% fat); 2 tbsp Worcestershire sauce; 8 cheddar or Red Leicester slices; 1 tbsp chipotle paste; 5 tbsp tomato ketchup; 2 tbsp mayonnaise; 4 large soft brioche buns (available in Marks & Spencer and Waitrose) or burger buns, halved; 4 thick leaves iceberg lettuces; 4 thick slices beefsteak tomatoes; 4 very thin slices red onions; 16 Bread & butter pickles (see Goes well with) or 2 gherkins , thinly sliced