That looks very tidy, especially considering it is now over 50 years old. I spent many hours of my misspent youth repairing these and shunting them in and out of the workshop. Most likely the Gardner 180LXB was connected to a 6-speed David Brown gearbox, and looks like it might be a Kirkstall rear axle on underslung springs (later ones had over-axle springs with helper springs). Almost certainly no power steering, it has the correct flat-spoked steering wheel, wipers were air operated and in period the mirrors were smaller.
We had one with a similar ballast box which was used as a recovery vehicle on trade plates. I drove it quite a few times on my car licence before I obtained my Class 1.