UK2000 has officially announced several new airport projects, that being Bristol 2020, Luton 2020, and Glasgow 2020. According to UK2000, development is now underway. With respect to a possible release timeline, Glasgow is planned for later this year, Luton is also possible later this year or perhaps early 2020, and Bristol is expected at some point in 2020. Keep in mind, these projects differ from the old Xtreme product line.
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*Image courtesy of UK2000 Scenery.