I assume you mean the one on prologis Park?
If so then all their motors and trailers were out. Always busy when I turn up there.
They have 12 or more rigids alone let alone trailers and units. Not sure how many trailers and units they have as most are out when I turn up at night.
All DHL sites have unmanned gates now for the most part, it was a cost cutting exercise to do away with gatehouse staff.
Some of the busier sites still have gatehouse staff though.