UK-based indie Verve Poetry Press will be open in March 2021 to submissions of full poetry collections. Follow them on Twitter (@vervepoetrypres) or sign up to the newsletter for exact dates nearer the time. Info here. Pay attention to the information the editors want to see included in your cover letter.
UK-based indie Verve Poetry Press is open for submissions of poetry collections and pamphlets. Act quickly: deadline is 20 June 2020 British Summer Time. Read full details/requirements, including number of pages for pamphlets vs collections, here.
UK-based indie press Nine Arches Press will be open for submissions of full poetry collections between 1 and 30 November 2017. Full information here. Unfortunately, the editors prefer it if poets submit initially to the magazine, Under the Radar. However, they will be not be open for submissions to the magazine until 1 December (open until 31 December) 2017. If you are submitting a full collection, read the submissions criteria carefully.