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.
Thanks to Abena Bediako for this heads up: UK-based indie press Flipped Eye Publishing is open to submissions of up to 6 poems or up to 3 chapters of prose until 30 November 2020. Full submission guidelines here.
American indie publisher Circling Rivers publishes poetry collections. Read the full guidelines before submitting – only those who follow the guidelines will be read.