Definition of "ever-changing"

Will the May timetable still be introduced?That depends on whether the UK's lockdown measures are lifted before the start date, which (at this time) looks extremely unlikely. With an ever-changing situation and dramatically reduced travel, it seems likely that some changes to timetables will be made, but it is too early to say whether the full timetable will be introduced.

2020 April 8, “Network News: COVID-19: Questions and Answers”, in Rail, page 10