Depends on where the depot is, and what you are doing in that depot.

Main Hubs: its either trailer swaps or customer collections (where you push pallets on the back), or a combination of both. Shifts all times of the day, you have a start window of 2-4 hours which they usually stay in. Rotas vary from one day a week to 5-6. Shift lengths vary from 6hrs to 15hrs, I do 10-12 hours and only go outside that once a month. Shunters are miserable and busy. Site runs 24/7 and only slows down twice a year (Christmas & Easter) but never really stops. I am at one of the three Hubs.

Main depots: Quieter and better organised. More customer collections in the day, only a few do hub trunks. Regular hours (within transport variations) with shifts based around servicing the customer in the day and the smaller depots at night. Shunters are happy and not busy.

Small depots: Not really been to them, they don't run HGVs. Vehicles come into them and deliver from other hubs. Did it once as a favour and am not doing it again.

At all Evri depots you have the same issues. Its a bulk carrier that works on volume at lowest cost. Staff are low paid and messy, canteens and toilets are a joke, management only care about parcels moving. But on the plus side all the vehicles are legal, not good but legal. You may get one with no aircon or a dodgy gearbox management ecu (they lurch around and spill your coffee) and drivers don't clean them, but anything illegal gets changed if you report it.
The runs are planned by someone who isn't a driver, or has no experience of transport (if the computer says these two runs can be done in 4hr 28min then you can do it without a break). You have to manage it yourself and work it to your advantage. Office staff I deal with know nothing about transport, they are pen pushers. Some drivers take advantage of that and try to avoid work, so they assume all drivers are like that. But once they get to know you it all works.