Collaboration forms an important part of Katharine’s professional work. She performs with oboist Julia White as Duo Arundo, an ensemble known for presenting engaging, themed programmes that explore distinctive and lesser-known repertoire alongside established works. The duo have appeared aboard Cunard and P&O ships, with international itineraries encompassing the United States, Africa, Norway, Hawaii and New Zealand.

Katharine also maintains a longstanding two-piano partnership with pianist Duncan Honeybourne. Since first meeting as conservatoire students, they have given numerous performances together and appear on two recordings of works by Andrew Downes.