In article <45815038$0$31235$da0feed9@news.zen.co.uk>, Adam says...

Pretty much especially with more and more firms running 24hrs a day.
Exceptions would be for lorries doing local building merchant work etc.

Take the X reg's in the fleet at one firm I drive for. Every one of
them is within a few tens of thousands of km off reachin 1 million. So
that's a 6 year old motor which isn't even running on nights as well
that's done 625000 miles or ~100,000 miles a year or ~2000 miles per
week or ~400 miles per day. They're not running 260 working days a year
due to being stood for the odd day for maintenance/servicing or when
it's a bit quiet so as you can work out, that increases the average
figure they'll do per day.

I once drove a 6 week old Scania DROPS wagon (4 axle rigid with a hook
on that mounts/demounts a compactor or skip) that already had 30,000km
on the clock just doing waste compactors at food manufacturers. On a
night, it went from Hedon just outside Hull to a bakers at the North
West side of Ipswich.

Another major name you'll recognise - Jewsons.

You'll have seen their artics about I presume? Blue Scanias. They run
out of Hull, Newport (Gwent), and somewhere near Cannock on the A5 but
cover nationwide. When they get back to the Yard around 4-6pm after
doing a day of deliveries, another driver jumps in them and then does a
night trunk, getting back to the yard around 4-5am. The lorries on the
night trunk from the Hull depot on King George Dock do Hull to J9 M5 or
Hull to Harlow or Hull to Ross on Wye five nights a week. I'll let you
work out the mileage for the nights. Bit harder to work out the days,
as there's quite a few different routes, but every wagon does one of
the night trunks I've shown.