Yes, it is In Paradisium from Faure's Requiem - the piece of music to which the gorgeous Inspector Morse died ... beautiful stuff!
And 'way to go' Natasha, he sure as hell got what he deserved - I just hope you don't get punished for it. Honestly, what a prat, "I'm going to sort it out, I've made my decision ..." Oh what a wonderful line from her, "You don't get to make decisions anymore Mark!" Bang!
Great bit of writing, really well played by the actors involved, yup, Emmerdale, great job!