Passenger describes moment plane makes emergency landing

We were due to leave Liverpool at 6:40am to Naples. The flight left with no problems and all was well. Then came the an acrid smell of burning. At first it seemed like nothing to worry about but as the smell grew as did the concern of some of the passengers. The captain then announced that they were apologetic for the smell of smoke and that the plane was to make an emergency landing as a precaution. The oxygen was issued in the cockpit as that's where the smoke was coming from. The crew remained extremely calm and professional. Some of the passengers started to notice that there was a mist coming from the air condition which the captain reassured us was completely normal. The flight landed safely on the ground and we were greeted by the firemen who came aboard (to our delight). Currently there is another EasyJet flight awaiting for us to board and we have been offered a free drink and small snack as a form of apology. The flight landed into Gatwick just 40 minutes after taking off at Liverpool. I commend the crew and captain for handling the situation in such a calm manner. One passenger has decided she would not like to continue with the next flight.