Hi, Rusty!
Well done, Mark Goodliffe, on winning eleven times!
Ten minutes ahead of the next competitor is indeed a goodly timing.
Thank you for explaining "en" and "nut"!
( I was quite happy though with my own parsing of "en" for "n", representing "nut"!)
I have "utilitarianism" for 1d...... but cannot parse it.
And I cannot fully parse your other favourite either...
19a: Somerset = Bath here (def)
s - sulphur
What else?
A bit too hard for me today.......
Fireworks banging away .... dog most upset......