Dear BA, I flew BA 203 from London to Boston on Saturday August 22nd and that is the worst flight journey thatI have undertaken in my entire life!!! A/C didn't work and I had to endure the heat throughout the journey.The attendant did mention that it was a hot day outside and once the flight picks up, the temperature inside will cool down. It did slightly cool down, but it definitely was not a good A/c system. I had just flown from Hyderabad - London via BA & that was a good flight. A/C was good & Hyderabad temperature is hotter than the London temperature and still the A/C didn't work in this sector of the flight! Next thing would be the entertainment sector - The same programs are being shown again and again with no changes. I flew from Boston-London & London-Chennai in July 2015 & the same programs/movies were repeated in August when I flew back. We pay hell a lot of money to travel by flights & this is not the proper way to entertain your customers!!! I was sick to my stomach during my return flight due to the heat & also there was no distraction due to the poor entertainment that was repeated. Also, some of the movies were deleted and no new movies added during my return flight - this added to my frustration!! Lastly, I saw droplets of water falling to the ground inside the aircraft, not sure if there was water leaking or if it was from the AC. But that was not good at all. Also, the flight attendants were very rude and made my children & I wait for our food though we had already booked our meals. I had a terrible experience & will never ever step foot on BA flights again. I am looking forward to discuss these issues with a BA representative so that others are saved from these issues Thanks