TUI have always had a certain amount of there work subbed out to 3 rd party carriers at all UK airports
Look at LGW for example, 2 Norwegian aircraft are permanently doing a lot of there work this summer and indeed next year as well , they just don’t have enough aircraft in the summer months , hence Sunwings of Canada being used at some of there bases in the summer months
Looking at the BOH base , the based aircraft is fully committed next summer as usual , with a CWL aircraft also operating on a W pattern on one day
TUI only have 3 flights subbed out next year to Turkey and Tenerife and this was down to an expansion of the operation out of BOH
Hardly a sign of pulling out , in fact I would say the opposite