Four carriers cover this corridor well. British Airways routes through Heathrow and puts you in the Club Suite, a 1-2-1 configuration with a closing door, White Company bedding, and a short hop onward to Bristol — this is the most natural connection given BA's Heathrow dominance. Lufthansa connects via Frankfurt on its newer Allegris business suites, also 1-2-1 with doors, and its A350 product has become one of the more talked-about hard products in Europe over the past year. KLM funnels through Amsterdam with a straightforward lie-flat 1-2-1 World Business Class cabin, decent for a traveler who wants Schiphol's efficient connections and doesn't mind the Delft Blue house giveaway on arrival. Delta, meanwhile, routes domestically through Atlanta or Minneapolis before crossing the Atlantic in its Delta One Suite, which has a sliding door and Tumi amenity kits — a solid pick for travelers who prefer to clear the long transatlantic leg on a US carrier before a shorter final segment into the UK.