Bit more detail here:
Long-standing flight school to leave
When asked why flight schools and light aviation activities could not commence on Monday - despite not needing commercial air traffic controllers in place for their activities - Stobart Group said it was undertaking "further and final tests".
Kate Willard, head of corporate projects, said: “We are taking this opportunity to conduct further and final tests on all technical and operational matters relating to the airport. This extensive process may impact some of the businesses, including flight schools, which operate out of the airport. We would therefore like to thank them for their patience, understanding and continued support for our shared project."
Interesting use of the word "shared"!
