When we heard that The Grand Tour was coming back for more seasons and that the show won't feature the famous tent in series 4 we were a little saddened to hear of the news, however in recent days it has emerged that the reason for getting rid of the tent was to reduce the noise of planes flying over the tent during recording times (see below)
You can't blame the presenters for wanting to get rid of the Noise from the planes though, can you? unless of course they decide to keep the tent but move it away from the end of the privately owned airfield.
The Grand Tour Returns January 18th 2019 on Prime Video
See original sources below