Thanks for the comments fellas.
The figures are from a couple of different companies. The commander is from Black Dog, the girl kneeling and the one sitting on the barrel are, as Jacques mentioned, Aurora. The Driver is Legend.
The commander and kneeling girls I got from BNA model world here in Australia. The girl on the barrel from Aurora via ebay and the driver from a website in the UK, but I can't remember the name of it.