Here are all the British and Irish authors recommended by H.P. Lovecraft in "Supernatural Horror in Literature" (especially from Section IX - "The Weird Tradition in the British Isles", but I've tried to pick out the key references from the rest as well).

All links go to free, legal online reading:

E.F. Benson - "The Man Who Went Too Far", "The Face", Visible and Invisible (esp. "Negotiam Perambulans" and "The Horror-Horn")

Algernon Blackwood - "The Willows", "An Episode in a Lodging House", "The Listener", Incredible Adentures, John Silence, Jimbo, The Centaur

Gerald Bliss - The Door of the Unreal

Emily Brontë - Wuthering Heights

Robert Browning - Childe Roland to the Dark Tower Came

John Buchan - Witch Wood, "The Green Wildebeest", "The Wind in the Portico", "Skule Skerry"

Lord Edward Bulwer-Lytton - Zanoni, A Strange Story



Walter de la Mare - The Return, "Seaton's Aunt", "The Tree", "Out of the Deep", "A Recluse" "Mr. Kempe", "All-Hallows", The Listeners

Daniel Defoe - "A Relation of the Apparition of Mrs. Veal"



A.C. Doyle - "The Captain of the Pole-Star", "Lot No. 249"