Sunwing are currently used out of Dublin Edinburgh and Leeds. The Dublin operation is well established whereas the Edinburgh and Leeds operation are new this summer. Whether or not they turn into a TOM operation will depend on numerous factors, and even then could be operated as W patterns out of other bases rather than opening a base there. Historically Leeds has been operated as a "Summer basing" using pilots temporarily from other bases. The 757 and 767 fleets will shrink over time leaving eventually just a 757 operation to cover routes not ideal for the NG. TUI have recently announced a significant 737 MAX order which presumably will replace the remaining 757s. Some "flip flopping" of pilots from 737 to 757 may occur in the meantime, but the recruitment will be to the 737.