They don’t take on full time staff… so if you’re ok with part time, something like 4 or 5 days per week 25-28 hours plus whatever overtime you do it can be not too bad. Start times aren’t early anymore.
I reckon it averages about 10 miles per day.
Entirely dependent on line management how tolerable it is, some are good, some are ok… all will lie to your face. Not the job for someone who wont stand their ground against bullies.
The weather thing is a bit of a non-issue really, you get used to dealing with it, and if you’re already out and about on bikes in all sorts of weather then you’re a step ahead of most.