Weather forecast for this coming week- a strong conveyor belt of east winds right across the continent. There are few obstacles to migration for any vagrants which are heading this way. In fact there is a bit of tail wind to help them. Should be plenty of continental drift migrants too. Good for birds from the east (near and far), bad for birds from the west- but there are always exceptions.
In the absence of weather fronts to concentrate birds- drift migrants and vagrants could turn up on a broad front. Off shore islands don't need fronts to concentrate vagrants- they are concentration mechanisms in their own right and if migrants are on the move over a wide area- they will be drawn in. Good place to be this week- on some remote island.