To be fair on them - Im 25 mins from a vet, and have had to wait over 6 hours for one (by which time It wa spointless and animal was .22) proximity does not mean you will get a vet when you need it, and remember it is TV - editing will play a large part in how it comes across, and whats to say the ewe wasnt inside 5 mins after filming?
And if their were 5 other stuck lambs in the field at that moment, I'd of been much the same in a rush.
As for de horning - Just re-watched, yes probably abit tight on the amount taken off, nothing wrong with moss, and again basing judgement on editing is risky,
And finally - We'll all do it and over trim - and anyone with horned sheep will agree - you will always have SOME that need trimming back, its not a sign of bad farming that a few need it, frequency would be the measure of that.
I would not be surprised if that one was chosen for the edit because it bled, out of how every many were filmed.