For a couple of years a little while ago it was 47841 "Spirit of Chester", even after it changed hands from Virgin to Freightliner, it still kept turning up everywhere. 60048 "Eastern" was another one, and 156443.
These days it appears to be 67005, 170115 and 170514. Those two Turbos seem to turn up with peculiar regularity compared to the rest of the class. And 158853 every time I'm around Sheffield.
On the flip side, 43366 would seem to actively AVOID me, anybody know how much work it has actually done for Crosscountry? Never ever turns up when I see the Crosscountry HSTs.