The four piano sonatas: past and present tensions

Pathways in the music of Sir Peter Maxwell Davies: from precursor works to the first two symphonies (2011)
Thesis

Domestic piano music in Victorian England : the case of (Edward) Sydney Smith (1839-89) (2011)
Thesis

An exploration of modal, serial, stochastic, electroacoustic and computer aided compositional techniques and their application into a series of original compositions (2010)
Thesis

Lear Settings (2009). 3-part animation by Rozi Fuller. Music for parts 1 and 3 by Borthwick. Duration: 35 minutes. Arts Council England funded project. DVD film premiered at Bradford Animation Film Festival 2009. (2009)
Other

Listeners' perceptual and emotional responses to tonal and atonal music (2007)
Thesis