Jet 2 were going to operate out of Blackpool as normal until the end of today then everything will be diverted to and from Manchester, instead of waiting until the 15th.
However whilst mid-air it appears the 9PM arrival into Blackpool by Jet 2 from Alicante has been diverted to Manchester, with an announcement on the Jet 2 website. Other sites still show it due in to BLK at 2100hrs.
Maybe the owners have gone in and booted out all the staff ahead of schedule, or they've all walked out.