The Annual Register, a "Review of Public Events at Home and Abroad," is a serial survey of history, politics, and the humanities, published in the U.K. since 1758. My campus library has nearly a complete run, parceled between print volumes and short stretches on microfilm. The trick, apparently, is to pay attention to the record in the online catalog, before realizing in the third floor stacks that the year you're looking for is actually on film in the basement, nine flights below.
The Register volume for 1946 delivers a quick criticism of Reed's first volume of poetry: 'In The Map of Verona [sic] (Cape), Henry Reed, one of the younger poets, develops a meditative romanticism not as yet sure of its own direction.'
The fact that his collection received notice at all speaks for Reed's promise as a poet, despite any reservations the editor may have had. The chapter surveying the literature of 1946 mentions several publications which also contain poems written by Reed: John Lehmann's Poems from New Writing, 1936-1946, which collects "Chrysothemis," and "The Wall"; and the journal Orion, which published Reed's "King Mark." Special attention is also paid to Edith Sitwell's The Song of the Cold (which Reed reviewed for the New Statesman in January, 1946), Richard Church's The Lamp, John Pudney's Selected Poems, Theseus and the Minotaur and Poems by Patric Dickinson, Poems from the North by Sir Shane Leslie, Vivian Locke Ellis' Collected Lyrical Poems, C.C. Abbott's The Sand Castle, Laurence Durrell's Plains and People, and Talking Bronco by Roy Campbell, among others.
Also noted is an anthology called For Those Who Are Alive (London: Fortune, 1946), an anthology of fifty of the 'youngest poets,' compiled by Howard Sergeant, editor of the journal Outposts. I wonder if, perhaps, something of Reed's is also collected there?