50 tips and hacks for travelers going to the UK from Bangladesh:

1. Passport and Visa: Ensure your passport is valid for at least six months beyond your planned stay, and obtain the necessary visa before traveling.
2. Flight Booking: Book your flights well in advance to get the best deals, and consider using fare comparison websites for the cheapest options.
3. Travel Insurance: Purchase travel insurance that covers medical emergencies, trip cancellations, and lost belongings.
4. Currency Exchange: Exchange Bangladeshi Taka for British Pounds at authorized exchange centers to get the best rates.
5. Pack Light: Pack light to avoid excess baggage fees and make it easier to move around.
6. Weather Check: Check the weather forecast for your destination in the UK and pack accordingly, especially if you're traveling during colder months.
7. Medication: Carry any prescription medications you need in their original packaging, along with a doctor's prescription.
8. Voltage Adapter: Bring a voltage adapter to charge your electronic devices as the UK uses a different plug type (Type G).
9. Emergency Contacts: Save emergency contact numbers for the Bangladesh High Commission in the UK and local emergency services.
10. Local SIM Card: Consider buying a local SIM card in the UK for cheaper calls, data, and easier communication.
11. Language: Brush up on basic English phrases to facilitate communication during your trip.
12. Public Transport: Familiarize yourself with the public transport system in the UK, including buses, trains, and the Underground (Tube).
13. Google Maps: Download offline maps or use apps like Google Maps to navigate your way around cities.
14. Tipping: In the UK, tipping is generally around 10-15% in restaurants if service isn't included in the bill.
15. Food Preferences: Be aware of dietary preferences and restrictions in the UK, such as halal or vegetarian options.
16. Emergency Funds: Carry some emergency funds in GBP in case of unexpected expenses.
17. Cultural Etiquette: Familiarize yourself with British cultural norms, such as queuing and politeness.
18. Health Precautions: Be aware of health precautions, such as COVID-19 guidelines and vaccination requirements.
19. Shopping Hours: Check the opening and closing times of shops, as they may vary from what you're used to in Bangladesh.
20. Safety: Keep your belongings secure and be cautious in crowded tourist areas to avoid pickpocketing.
21. Local Events: Research local events and festivals happening during your stay for a unique experience.
22. Historical Sites: Visit historical sites and museums to learn about the UK's rich history and culture.
23. Local Cuisine: Try traditional British dishes like fish and chips, English breakfast, and afternoon tea for a culinary adventure.
24. Free Attractions: Take advantage of free attractions like museums and parks to explore without breaking the bank.
25. Travel Apps: Use travel apps for booking accommodations, finding restaurants, and discovering attractions.
26. Emergency Kit: Pack a small emergency kit with essentials like bandaids, pain relievers, and allergy medication.
27. Travel Documents Backup: Keep photocopies or digital copies of your travel documents, including passport and visa, in case of loss or theft.
28. Local Transport Passes: Consider purchasing a local transport pass for unlimited travel within a specific area or city.
29. Weather-Appropriate Clothing: Pack layers for unpredictable weather, including a waterproof jacket and comfortable walking shoes.
30. Tourist Passes: Look into tourist passes for discounted entry to popular attractions and tours.
31. Cash vs. Card: Carry a mix of cash and card for payment flexibility, as some places may not accept cards.
32. Time Zone: Be aware of the time zone difference between Bangladesh and the UK to avoid confusion with schedules and appointments.
33. Local Customs: Respect local customs and traditions, such as greeting with a handshake or saying "please" and "thank you."
34. WiFi Availability: Most hotels, cafes, and public spaces offer free WiFi, making it easy to stay connected.
35. Photography: Respect signage and rules regarding photography in museums, galleries, and historic sites.
36. Public Toilets: Carry change for public toilets, as some may require payment for access.
37. Healthcare Facilities: Familiarize yourself with nearby hospitals or clinics in case of medical emergencies.
38. Local Etiquette: Queue patiently, wait for your turn, and avoid loud conversations in public places.
39. Alcohol Laws: Familiarize yourself with alcohol laws and drinking age requirements in the UK.
40. Local Transport Apps: Download local transport apps for real-time updates on schedules and routes.
41. Tourist Information Centers: Visit tourist information centers for maps, brochures, and helpful advice from locals.
42. Cultural Events: Attend cultural events, such as theater performances or music concerts, for a taste of British arts.
43. Eco-Friendly Practices: Follow eco-friendly practices, such as using reusable water bottles and recycling waste.
44. Hotel Reservations: Confirm hotel reservations in advance and check for any special requirements or preferences.
45. Safety Apps: Install safety apps on your phone for emergency assistance and location tracking.
46. Local Markets: Explore local markets for unique souvenirs and authentic shopping experiences.
47. Transport Strikes: Stay updated on transport strikes or disruptions that may affect your travel plans.
48. Local Cuisine Tours: Join food tours to discover hidden culinary gems and local specialties.
49. Cultural Sensitivity: Be sensitive to cultural differences and avoid topics that may be controversial or offensive.
50. Enjoy Your Trip: Finally, relax, enjoy your trip, and embrace the cultural diversity and experiences the UK has to offer!