youngmafbog : "Not sure a temporary visa for foreign drivers would help much. They didnt just leave because of Brexit despite what people saybut because pay and conditions became equal in their own countries as they benefitted from EU investment." @ 13:14 Fri 24th Sep 2021
Depends on where you think these foreign drivers would come from, and I doubt Western Europe - unless a huge financial incentive, which I think unlikely.
"...lorry drivers employed by Western European Hauliers typically cost 179% more than their Eastern European counterparts."
https://trans.info/en/eu-report-reveals-pay-gap-between-western-and-eastern-european-truckers-226234
IR35 is rather complicating things, but bottom line, give the HGV drivers fair, ample reward, IR35 should be academic ( of zero consequence) to HGV drivers financially.