Never mind that, imagine playing Jean Valjean in fron of Colm Wilkinson
We did a production of Man of La Mancha a few years back - a show CT also performed in - during the interval someone spotted him sitting in the audience.
Now to an amateur society there was a mixture of "OMG I can't believe it" & "Who the hell is CT Wilkinson??" He very nicely came backstage and spoke to the cast & crew, it was all very nice I must say.
Interestingly enough, back to the Les Mis concert, I noticed at the end that the Demo Phantom of the Opera (CT) and the new sequel Phantom (Ramin) were sharing a mic!!