The British Airways first-class experience on the Boeing 787-9 Dreamliner starts right as you pass through security at Heathrow's Terminal 5. Instead of turning directly into tourist-trap shops, you turn immediately into the first-class lounge, the Concorde, which has the feeling of a five-star hotel. When it's time to board, it's the bigger the better on board the new 787-9 Dreamliner, where guests are greeted with three different Champagne options.
You can tell the flight attendant what size you are for your pajamas, which come in an Anya Hindmarch pouch along with aromatherapy and proper slippers. For your entertainment purposes, you will find a 23-inch screen (I think that's bigger than my college dorm TV!) to watch movies or play games, along with seats that turn into completely flat 198-cm beds, complete with duvet and pillows. There is plenty of storage for all of your personal items as well as cables and plugs to charge up your electronics.
Since the Brits are famously known for their delicious high tea, expect the same at 30,000 feet, where fliers can enjoy tea sandwiches, mini cakes, scones, clotted creams, and various jams. And if you head to the bathroom to change into your PJs, you can expect turn-down service to greet you with a delicious little chocolate on your pillow.