Alpha and Bravo platforms stopped production in November 2014, Brent Charlie in March 2021. Decommission The Brent pipelines decommissioning programme was approved by the UK government in March 2020. As per the decommissioning plan, the gravity-based structures (GBS) of Delta, Charlie, and Bravo platforms, the jacket footings of Alpha platform, drill cuttings, and the GBS cell contents will not be removed from the field. The GBS subsea storage cells were used to temporarily store crude oil before pumping to tankers or pipeline. The Brent field is being decommissioned in a phased manner. The Brent Delta topside decommissioning programme was approved by the UK government in July 2015, while that for the Alpha, Bravo, and the Charlie platforms were approved in August 2018. The topsides of the Brent Delta platform, weighing approximately 24,200 t, was removed in a single-lift in April 2017 and transported to Hartlepool for recycling. The topside was completely dismantled by February 2019. The topsides of the Brent Bravo platform, weighing approximately 25,000 t, was removed in a single-lift in June 2019. The topside is currently being dismantled and recycled. The legs of the Brent Bravo and Delta platforms remain in place with their GBS subsea storage cells. This will also apply to the Brent Charlie platform when decommissioned. The contents of the GBS storage cells are likely to be residual hydrocarbons and radioactive toxic elements. Air incidents involving workers On 31 July 1979, Dan Air fixed wing aircraft crashed attempting to take off from Sumburgh Airport. The flight was returning Brent Field workers to Aberdeen. There were 17 fatalities. The aircraft was an ex Aerolineas Argentinas HS 748 manufactured in 1962. The main cause was found to be a faulty gust lock. The co-pilot was found to have tranquillisers in his system. It is not known if he was in control as he had less than 100 hours on this type of aircraft. On 6 November 1986, a Boeing Vertol BV234 Chinook helicopter G-BWFC crashed on approach to Sumburgh airport. The flight was returning from the Brent Field. There were 45 fatalities and 2 survivors one of whom was the pilot. The cause was found to be faulty transmission, which caused the twin rotor blades to collide. On 25 July 1990, a Sikorsky S61-N helicopter G-BEWL crashed while attempting to land on Brent Spar. There were 6 fatalities including both pilots. The cause was found to be