 In 2018 King composed a new three movement piano concerto for Derek Paravicini which was first performed at the Mainly Mozart Festival in San Diego conducted by Michael Francis (conductor)

King has also experimented with unusual combinations of instruments, sometimes located in unconventional performing environments.The "King's Wood Symphony" (2007) for multiple horns with percussion and an electronic score by Nye Parry was composed for performance in a forest (originally King's Wood in Kent).Described as "a site-specific symphony, one that could never sound the same way twice", the work utilises the harmonic spectra of natural horns and electronically altered horn sounds calling to each other across a vast performing space.