Here's a wonderful review of Perfect Nonsense. Interestingly, the audience gave a standing ovation for the performance.
About Matthew Macfadyen:
The physical comedy and essential timing displayed by all three actors was utterly perfect. Not one beat was missed and the energy displayed on stage was impressive. ... Matthew MacFadyen, more usually associated with dramatic roles, had another chance to display his range as a comedy actor, following his stint in Private Lives in 2010. He leapt deftly between roles, changing voice and costume with great speed and pulling off the remarkable trick of managing to play Jeeves playing Gussie Fink-Nottle etc.
Be sure to read the full review