Sure! Your tour to Bristol, Bath, Exeter, and Plymouth would be a wonderful experience. Here are some travel tips:

Best Time to Visit:
The best time to visit these British cities is in the late spring to early autumn, from May to September, when the weather is quite pleasant. You can also visit in December to enjoy festive and winter events.

Route and Accessibility:
You can start your journey from London, then Bristol, Bath, then Exeter, continuing to Plymouth. All cities are well connected through trains and buses.

Altitude and Acclimatization:
You won't need to worry about altitude sickness here, as all the cities are at sea level or close to it.

Accommodation and Booking:
Pre-book your accommodations. For a budget trip, consider the hostels and bed & breakfasts. For luxury, choose from abundant hotels.

Clothing and Essentials:
Pack clothing according to the season. A good pair of comfortable shoes is always recommended as there will be a lot of walking. Carry an umbrella or raincoat always as rain can be unpredictable in this region.

Health and Safety:
Even though these cities are safe, it's advised to follow usual travel precautions. Keep your belongings close and beware of pickpockets in crowded areas.

Local Etiquette and Respect:
British people are polite and courteous. Always queue in public places, and small talk about the weather is always appreciated. Keep in mind that tipping in restaurants is common in the UK, usually around 10-12%.

Attractions to keep in mind:
Do visit the Bristol Museum & Art Gallery and shopping at Cabot Circus in Bristol, the Roman Baths and Thermae Bath Spa in Bath, the Exeter Cathedral and Underground Passages in Exeter, and the National Marine Aquarium and The Hoe in Plymouth. Enjoy your trip!