Why would they come here in the first place on a 3 month contract? They're in high demand everywhere.
Yes you're right, the UK is not the only place experiencing driver shortages.

And also, why indeed would they come here when we don't have the services to make their life on the road particularly pleasant?

What's interesting though is these problems are not new, they didn't suddenly emerge the day we left the EU. We've always had crap roadside services, mainland Europe was always a better place for HGV drivers to work. Even British drivers are happier when they're driving in Europe. There's been high demand across Europe for many years. So why did the European drivers come to work here in the first place?