After last year's problems, I spoke to ATC who stated that they would not condone any other RT call than finals. Of course this means that, especially in less than perfect viz, one has no idea where other aircraft are. Add to this the problem of pilots not following the same approach path from the hold, arriving at the wrong time or worse still, arriving without a slot, not having read the NOTAM (that happened) and/or flying variable speeds (the one ahead of me was flying at 50 knots, my VAT is 65 its) was a recipe for problems.
95 % of us are professional, but it only needs one crow to scatter the pigeons.
Keep you eyes open.