Total prize money is £20,000.
No more than 30 poems should be submitted -- if extra are submitted, then they will be pulled. "The work submitted may be a published or unpublished volume of poetry, drama-poems or belles-lettres."
CONDITIONS OF ENTRY
The judges' decisions (both as to eligibility and the winning entries) shall be final. The judges reserve the right not to make any Eric Gregory Awards if, in their opinion, no works entered reach a sufficiently high standard.
https://www.societyofauthors.org/Prizes ... ic-Gregory
Here's the link! Definitely check this out.