Governments usually refuse to capitulate to the demands of terrorists.
And just to make the point, the UK formally pledged not to negotiate with hijackers at the 1963 Tokyo International Convention on Hijacking. But it was a promise that was broken in 1970. On 6 September that year four airliners were seized by the PLFP - the Popular Front for the Liberation of Palestine, a radical Palestinian faction. Two of the planes were taken to a former RAF airstrip in the middle of the Jordanian desert, known as Dawson's Field. A third was blown up in Cairo after the passengers and crew were released.