I had used Hatton's since about 1984 and from 2000 onwards in Australia and have never been charged GST even on the couple of occasions that they said they were going to start.
It has not re-appeared on mine but I did email them the other day and was told If I wanted something removed from My Trunk, let them know what it is and they will do it for me.
This is what I miss about the UK. This is not West Malling (Great Warbirds) but during the 80's I would go every year. All of these and more would be there.
If the set has the right loco, it will have the cheap throw away motor in it that came after the X04 and X03 and will have a sprung rear axle, with traction tyres on the centre axle and split connecting rods.