Hello! That sounds like a fantastic trip to some of the beautiful cities in the United Kingdom. Here are some travel tips to help you plan.

Best Time to Visit:
The best time to visit cities like Brighton, Portsmouth, Bournemouth, and Exeter is during the late spring to early autumn period (May through September). This is when the weather is most favourable and you can enjoy outdoor activities.

Route and Accessibility:
Flight connectivity to the UK is excellent from major worldwide cities. Upon arrival, the most convenient way to travel between Brighton, Portsmouth, Bournemouth, and Exeter is by train. Car hire is also a popular option for more freedom, as the UK has a well-maintained network of motorways.

Accommodation and Booking:
Booking accommodations in advance is recommended, especially during the peak summer months. A variety of options are available from luxury hotels to budget-friendly bed-and-breakfasts and hostels.

Clothing and Essentials:
Pack both light and warm clothing to accommodate the unpredictable British weather. Don't forget waterproof items for unpredictable rainy days, comfortable walking shoes, and sun protection for sunny days. A power adapter for UK outlets might also be necessary depending on your home country.

Health and Safety:
While the UK is quite safe, always maintain regular precautions such as keeping an eye on your belongings in crowded areas. The UK offers exceptional healthcare services, but it's recommended to have travel insurance.

Local Etiquette and Respect:
Brits are known for their politeness and queues. It is important to follow suit. Respect historical sites and locals' privacy. Remember to tip waitstaff in restaurants, taxi drivers, and hotel staff.