I think Manchester has all the Norway it needs.
Lyon does seem under-served.
Bucharest has to be top of the list in terms of un-served EU destinations. I really quite like the place.
Ankara - I would say is a total non starter. It barely has any international flights anyway. A huge, shiny and over-spec terminal with hardly any people in it for most of the day. Turkish will happily funnel you through IST or you can get good connections through FRA or MUC. Very little demand for a non-stop I would guess.
Can't believe we haven't got BTS when so many other airports have.
JET2 is the problem here in my opinion. We end up with the worst of both worlds: no hub connections at VIE and no BTS.
OS should serve VIE as a *A hub - this would enhance the existing LH hub offerings.
That would leave the way open for RYR to serve BTS