Competition at this level is intense. Poetry Review get 30,000 poems a year of which they print 120. They seem to reply ever more quickly and decisively to my submissions. Others, especially the more frequent ones, have articles, reviews and encourage reader participation through letters. Acumen is like PN Review in this respect but more readable.
Some magazines go further still, attempting to cover both poetry and prose.
Stand and London Magazine keep going, maintaining high standards on very different budgets. The recently deceased Iron was lively and variagated. The North is too. Both have publishing arms. Staple is still going strong and is perhaps the most under-estimated of the magazines here.