[1][2] Culley recorded his debut album with the British musician and producer Giles Perring, Bundle of Nerves, in an old school classroom on the Scottish island of Jura.

[3] Incorporating Perring's multi-instrumental abilities and the bass playing of Simon Edwards (Fairground Attraction, David Gray, Billy Bragg), the album was released to critical acclaim in 2010, MOJO magazine referring to it as an 'impressive début' and awarding it four stars.

'[4] The Italian website Ondarock.com also lauded Phosphor, saying 'Phosphor is a valuable antidote to the poverty of inspiration and courage of many heroes of the indie singer-songwriter genre.

The album was produced by Daniel Webster, who provided contributions on a variety of instruments, and features backing vocals from London-based artist Lettie.

It was lauded by Hi-Fi News & Record Review, Folk Radio UK, and R2 (Rock'n'Reel), the latter calling the album 'a masterful collection from a stellar singer-songwriter.