As reported on SouthParks Social Media
LEGO Star Wars Miniland is set to close at the end of the year, with the last chance to visit being 31st December, not long after the release of Episode 9.
Source: Legoland Windsor
Attention, LEGO® Star Wars™ fans! We’re bidding the LEGO® Star Wars ™ Miniland model display at LEGOLAND goodbye. You can still enjoy the display until 31/12/2019 so be sure to visit before it’s off to a galaxy far, far away/it departs on 30/12/2019!
Whilst not confirmed, it's possible the worldwide agreement between Disney/Lucasfilm and Merlin/Legoland has ended, with the Star Wars IP being pulled from other Legoland parks not long after it's removal from Windsor.