Not going to justify these in detail, but wanted to record my thoughts anyway.
6) “Limited Edition”, by Tim Maughan
5) The Flight of the Ravens, by Chris Butler – some details rather threw me.
4) “Immersion”, by Aliette de Bodard
3) “Three Moments of an Explosion”, by China Miéville
2) Adrift on the Sea of Rains, by Ian Sales – excellent bleak alternate space race with Nazi occult McGuffin, and twist at the end.
1) “Song of the Body Cartographer”, by Rochita Loenen-Ruiz – somehow grabbed me in a way the others didn’t.
Well done to the BSFA on producing such a lovely awards book.
PS if you liked this, there’s a collection of his spooky short stories called “October Country”, which are equally good if not better. It’s out of print but I got mine cheap on Amazon.