That’s A Mooré - Legendary corporate entertainment where three undercover waiters burst into song.
That's A Moore
The Totties are Paul Smith and Carolyn Allen. Together as Opera Tottie, they perform non serious opera works, with the emphasis on fun and frivolity. If you like opera you'll appreciate them and if you hate opera you'll love them, as it's all very tongue in cheek. They can also write and perform a special one off piece about the company/directors etc (exact content up to you of course).