B753 by markyharky (license CC by) A Thomas Cook Boeing 757-300, registration G-JMAA performing flight MT-1125 from Sofia (Bulgaria) to London Gatwick,EN (UK) with 280 people on board, was enroute at FL340 about 100nm south of Budapest when the crew declared PAN reporting “smoke in the flight deck” and decided to divert to Budapest. While descending towards Budapest the crew performed the smoke drills and subsequently reported that the smoke and fumes in the flight deck had dissipated but there was still a strong smell of burning in the cabin and some smoke. The aircraft landed safely on Budapest’s runway 31R about 20 minutes after leaving FL340. Emergency services checked the aircraft, which afterwards taxied to the apron. The passengers were taken to hotels. The occurrence aircraft remained on the ground for about 17 hours, then continued the flight and is estimated to reach Gatwick with a delay of 21 hours.