The only Z I can think of is :
Zweiger -or something like that
A foreign outfit seen on our roads I seem to remember.
Calv
After that iffy Z
Aston Clinton Haulage - now part of Norberts big red fleet
Calv
Barline Transport (N.I. FIRM)
Carmara (Vermont firm)
Dewart Transport ( another N.I. firm)
Estes (an LTL Haulier over here)
Frigoskandia
Geoff Gilbert (are they stll going?)
hargraves(now part of turners of soham)
i r f . fridge transport from stoke
jeffreys haulage .swadlincote
Kennesaw Transportation (a Georgia outfit )
London Carriers
Mulgrew Transport (N.I. firm)
Niven T P
Sam Ostle from up north near Settle
Calv
Pentons Haulage
Cant think of any Q’s so
R P L Transport
Scotlee Transport
Tinnelly Transport