BSFA Award for Best Novel

The BSFA Awards are given every year by the British Science Fiction Association. The Best Novel award is open to any novel-length work of science fiction or fantasy that has been published in the UK for the first time in the previous year. Serialised novels are eligible, provided that the publication date of the concluding part is in the previous year. If a novel has been previously published elsewhere, but it hasn't been published in the UK until the previous year, it is eligible.

From the Wikipedia article “BSFA Award for Best Novel”, licensed under CC BY-SA 4.0.

Check the official rules of the BSFA Award for Best Novel for the current eligibility window, accepted formats, residency or language requirements and any entry fee. For most established prizes the publisher submits on the author's behalf, often with a limit on entries per imprint.

If you are self-published, look for an explicit statement that independently published books are accepted, and budget for entry fees and copies for judges.