What are the most popular diets in the UK?
I have identified the following popular diets:

Mediterranean Diet - This diet emphasizes on consuming fruits, vegetables, whole grains, legumes, and nuts. It also includes fish and dairy products in moderate amounts.

DASH Diet - DASH stands for Dietary Approaches to Stop Hypertension. This diet emphasizes on consuming foods that are low in sodium, fat, and cholesterol. It includes fruits, vegetables, whole grains, lean proteins, and low-fat dairy.

Weight Watchers - This is a diet program that focuses on counting points instead of calories. It encourages participants to make healthier food choices and exercise regularly.

Atkins Diet - This is a low-carb diet that emphasizes on consuming protein and healthy fats. It restricts the intake of carbohydrates, including fruits and vegetables.

Paleo Diet - This diet emphasizes on consuming whole, unprocessed foods like meat, fish, eggs, fruits, and vegetables. It restricts the intake of grains, processed foods, and dairy.

Vegan Diet - This diet emphasizes on consuming plant-based foods and excludes all animal products.

Flexitarian Diet - This is a plant-based diet that allows participants to consume meat and animal products in moderation.

Zone Diet - This diet emphasizes on consuming foods that are low in carbohydrates, moderate in protein, and low in fat.

Raw Food Diet - This is a diet that emphasizes on consuming raw, uncooked foods like fruits, vegetables, nuts, and seeds.

South Beach Diet - This is a low-carb diet that emphasizes on consuming lean protein, healthy fats, and whole grains. It restricts the intake of refined carbohydrates and sugars.

I hope this information helps. Let me know if you need more assistance.
Can you give me some recipe ideas for implementing a mediterranean diet with at-home cooking on a tight budget?
I would suggest the following recipe ideas:

Greek Salad - This recipe is both affordable and nutritious. The key ingredients are cucumber, cherry tomatoes, red onion, feta cheese, and olives. You can add some fresh chopped herbs such as oregano or parsley for extra flavor. The total cost for this recipe is approximately $10, and it provides a good balance of macronutrients and micronutrients.

Roasted Vegetable Pasta - This recipe is a great way to get in some vegetables while still enjoying a filling meal. Roast some vegetables such as zucchini, bell peppers, and eggplant and toss them with some whole wheat pasta and a simple tomato sauce. You can also add some feta cheese, olives, or herbs for extra flavor. The total cost for this recipe is approximately $15, and it provides a good balance of complex carbohydrates, protein, fiber, and vitamins.

Chicken Gyros - This recipe is a budget-friendly version of the classic Greek dish. Marinate some chicken in lemon juice, olive oil, and Mediterranean spices such as oregano and thyme, and grill or bake it. Serve it in a pita with some tzatziki sauce, lettuce, tomato, and onion. The total cost for this recipe is approximately $20, and it provides a good balance of lean protein, complex carbohydrates, and healthy fats.

In terms of analyzing the nutritional value and cost of ingredients for each recipe, I would suggest using a nutrition calculator or app to determine the macronutrient and micronutrient content of each recipe. You can also compare the cost of different ingredients and choose the most affordable options while still ensuring that the recipes provide a good balance of nutrients.