Do your checks first. I jumped to the rack and put a new one on and it's exactly the same. Mines had rack, track rod ends, ball joints, bushes and change in suspension (not everything was changed to fix this issue but since its all in the same area its good to mention) but none of that fixed the problem. Now when I went to the garage the first time to get mine fixed they said they changed the steering Columb but when I asked if it was the part inside the van or the part outside the van they didn't no and some how didn't have the old part there to show me. But the only part I've not changed my self is the outer steering colum, if the garage did change that part then I'm out of options. If they didn't change that part that's my last part to change as there's no play on the steering Columb inside.Yes, mine does the same as yours. And yes, at motorway speeds it feels a little strange. It's not dangerous or anything, just a little annoying.
There are 2 T5s at my work just now, both have freeplay. Both have been checked and it's in the rack. The other vans we have had in all have had play with the exception of one.
One day mine will be treated to a nice new rack, but after spending a few pounds replacing the whole fuel system, it's not getting anything spent on it any time soon!
Mine just feels like your chasing the wheel all the time on dualcarage ways and motor ways