I see that Flybe has improved their inter-island timetable for the winter. The evening Exeter triangular flight will be reversed and route EXT-JER-GCI-EXT instead, allowing an evening flight from Jersey to Guernsey. I travel on this route regularly and will be pleased not to have the added journey time, but importantly it allows a day return for business passengers, which makes Flybe slightly more competitive on inter-island. Fares are cheaper although there is not a great deal of flexibility like Aurigny and Blue Islands.
Norwich remains for the winter at 4x weekly and Manchester looks like it has been dropped. This would leave time for an additional lunchtime Southampton flight if that rumour were to be true. I think this was the case up until a few years ago? Either way the Guernsey Q400 is free.