The reversing ex hasn’t been dropped from any test! Car or HGV!!
What they don’t test you on is a turn in the road, or reversing around a corner. They are however still taught.
What they do test you on is one or two of three; parallel parking at the side of a road, bay parking or, finally, you may be asked to pull up on the right-hand side of a quiet road, reverse and rejoin the flow of traffic.
If you are tested on parking in a bay, you will be required to either drive in and reverse out, or reverse in and drive out.
If you are required to complete the final reversing manoeuvre, you will have to pull up on the right hand side of the road before reversing back for a couple car lengths to get a view of the road before pulling back out.