Here's a suggested itinerary for a holiday from the UK with nights in Dubai, 3 nights in Singapore, and 7 nights in Phuket:

Day 1: Arrival in Dubai

• Fly from the UK to Dubai International Airport.
• Transfer to your hotel in Dubai and check-in.
• Spend the rest of the day at leisure, exploring the hotel's amenities or relaxing by the pool.
• In the evening, enjoy a dinner at a local restaurant or venture out to explore Dubai's vibrant dining scene.

Day 2: Dubai City Tour

• Take a guided city tour of Dubai to see its iconic landmarks.
• Visit the Burj Khalifa, the world's tallest building, and enjoy panoramic views from the observation deck.
• Explore the Dubai Mall, one of the largest shopping malls in the world, and marvel at the Dubai Fountain show.
• Visit the Palm Jumeirah, an artificial island known for its luxury resorts and the Atlantis, The Palm.
• In the evening, enjoy a desert safari experience with dune bashing, camel riding, and a traditional Arabian dinner.

Day 3: Free Day in Dubai

• Enjoy a free day to further explore Dubai at your own pace.
• Visit the Dubai Marina, a waterfront area with restaurants, cafes, and shops.
• Explore the historic district of Al Bastakiya and visit the Dubai Museum.
• Take a stroll along the Dubai Creek and experience an Abra ride, a traditional wooden boat.
• Indulge in shopping at the Gold Souk or explore the modern Dubai Marina Mall.
• In the evening, relax at your hotel or dine at a rooftop restaurant with a view of the city skyline.

Day 4: Flight to Singapore

• Fly from Dubai to Singapore.
• Transfer to your hotel in Singapore and check-in.
• Spend the rest of the day exploring the vibrant city, visiting attractions such as Gardens by the Bay, Marina Bay Sands, or Orchard Road for shopping.
• In the evening, savor the local cuisine at a hawker center or enjoy a dinner at a trendy restaurant.

Days 5-6: Singapore Exploration

• Spend two full days exploring the attractions of Singapore.
• Visit Sentosa Island and enjoy its various attractions like Universal Studios Singapore, S.E.A. Aquarium, and Adventure Cove Waterpark.
• Explore the cultural neighborhoods of Chinatown, Little India, and Kampong Glam.
• Take a river cruise along the Singapore River and enjoy the city's skyline.
• Visit the iconic Merlion Park and the Botanic Gardens, a UNESCO World Heritage site.
• Experience the famous Night Safari at the Singapore Zoo.

Day 7: Flight to Phuket

• Fly from Singapore to Phuket, Thailand.
• Transfer to your hotel in Phuket and check-in.
• Spend the rest of the day relaxing and enjoying the beach or exploring the nearby area.

Days 8-13: Relaxation in Phuket

• Enjoy six full days of relaxation and exploration in Phuket.
• Relax on the beautiful beaches of Patong, Kata, or Karon.
• Take part in water activities such as snorkeling, diving, or island hopping.
• Explore the Old Town of Phuket with its charming architecture and local markets.
• Visit the Big Buddha, Wat Chalong, and other cultural and religious sites.
• Indulge in Thai massages and spa treatments.
• Experience the vibrant nightlife of Patong, including Bangla Road's entertainment district.

Day 14: Departure

• Enjoy your final breakfast in Phuket.
• Check out of your hotel and transfer to Phuket International Airport for your return flight to the UK.

Please note that this itinerary provides a general framework for your holiday, and you can customize it based on your preferences