Nutcracker
Stop Brexit!
There's also the reverse question: which currently fairly widespread species are we next going to lose as regular breeders in Britain? I fear these becoming extinct or rare passage visitors:
Wood Warbler
Whinchat
Spotted Flycatcher
Turtle Dove
Lesser Spotted Woodpecker
Willow Tit
Wood Warbler
Whinchat
Spotted Flycatcher
Turtle Dove
Lesser Spotted Woodpecker
Willow Tit