[5] The album's songs were well received by critics: review aggregator Metacritic gave the record a score of 81 out of 100, indicating "universal acclaim".
[14] Red's songs received less critical acclaim than their debut's; Metacritic awarded the album a score of 60 out of 100, suggesting "mixed or average reviews".
[16] It was the first Guillemots album to feature neither a strings nor brass section – its tracks were described by The Independent as being more "noticeably stripped down" than those of previous releases.
At the end of 2005, the band uploaded a demo of their song "Cold Cool Moon" to their official website for fans to download for free.
[43] During a series of live shows in 2006, the group featured in their set lists the Christmas carol "In the Bleak Midwinter" and original songs that had not formed part of Through the Windowpane.
[50] In 2011, Guillemots recorded a version of "Tomorrow Never Knows" by John Lennon and Paul McCartney for the BBC's coverage of Glastonbury Festival 2011.