A sought-after recitalist, Thomas has collaborated with pianists Malcolm Martineau, Roger Vignoles, Rudolf Jansen and Paolo Giacometti, among others, in Cambridge, Vienna, Zürich, Basel, Antwerp, London (Wigmore Hall), Tokyo and Paris, and as a regular guest at the Concertgebouw Amsterdam. This is his ENO debut.

Notable roles elsewhere: Lescaut Manon, Marcello and Schaunard La bohème, Hercule Alceste, Gugliemo, Donner Das Rheingold, title role Hamlet, Count and Figaro Le nozze di Figaro, Silvio de Nardi Bomarzo, Mr Redburn Billy Budd, Eisenstein Die Fledermaus, Harlequin Ariadne auf Naxos, Figaro Il barbiere di Siviglia, Gunther Götterdämmerung and Frank Die tote Stadt, in Toulouse, Madrid, Geneva, Gothenburg, London, Strasbourg, at the Salzburger Festspiele, the Bregenzer Festspiele, Holland Festival and Festival d’Aix-en-Provence. His concert repertoire ranges from the Bach Passions to Mahler, Shostakovich and Frank Martin, which he has performed with leading orchestras in Europe and Asia, and conductors such as Jiři Bělohlávek, Marc Albrecht, Ivor Bolton, Frans Brüggen, Hartmut Haenchen, Edo de Waart, Jaap van Zweden, James Gaffigan and Yannick Nézet-Séguin.