[3] In September 2023, group member James Cargill, who has taken on the role of managing Broadcast's remaining material, announced on Facebook that he would be issuing a collection of previously unreleased demos in early 2024.

[4] In March 2024, Warp Records announced the release of two demo albums: Spell Blanket in May 2024, and Distant Call in September 2024.

Spell Blanket consists of unreleased demos by Keenan recorded to 4-track tapes and MiniDiscs that were intended for the follow-up to Broadcast's 2005 album Tender Buttons.

[6] The same day of the announcement, a track off each album was released, with Spell Blanket's being a previously unheard song, "Follow the Light".

Piers Martin of Uncut gave the release a 9/10 rating, writing of how "It fills in gaps we didn't know were there, offers tantalizing clues to their unfinished fifth album, and somehow ends up enhancing their mystique, despite laying all the cards on the table."