The best way, in my opinion, after a long International flight is to book a private car service from the Airport to your first destination. There is nothing better than having your private driver meet you inside the terminal, helping you load your luggage into a car near by and then whisking you away to begin your adventure. I researched cost and reviews to find a reasonable service from Heathrow to Bath and I found the Bath Private Car Hire. Steve was very quick to respond to my email inquiry and also gave us the best rate over the 5 other services I reached out to. Our driver Richard was patient with us as we encountered delays in Customs, as well as thoughtful and engaging during our drive as we began our journey to Bath. Would use this company again and would highly recommend to others!