Betty Trask Award

The Betty Trask Prize and Awards are for first novels written by authors under the age of 35 who reside in a current or former Commonwealth nation. Each year the awards total at least £20,000, with normally one author receiving a larger prize amount (£10,000 in very recent years), called the "Prize", and the remainder given to the other nominees, called the "Awards". These were established in 1984 by the Society of Authors at the bequest of the late Betty Trask, a reclusive author of over thirty romance novels. They're given to traditional or romantic novels, rather than those of an experimental style, and either published or unpublished works.

From the Wikipedia article “Betty Trask Prize and Awards”, licensed under CC BY-SA 4.0.

Check the official rules of the Betty Trask Award 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.