Anyone know where this is or whose cars are in the photos

Yes, the white Rover in the front of the pic now belongs to Sam Taylor . It is the ex-Ken Nelson Rover Chev (it ran a 350 Chev in this photo, but Ken also ran a 5 Litre F5000 engine in it later on). It's now blue and white and has a 350 Chev again.
We're desparate to get them to bring the Rover out to a CAMS State Round in QLD because it is a car with some potential and Sam drives it pretty well in it's infrequent appearances.
The multi-coloured car was once a Commodore (it's an Opel-Something with a 350 Chev in this photo back in 1990) belonging to Simon Harrex. Unfortunately, the car didn't run for long in this guise as Simon sideswiped the armco under the bridge (drivers side) with a fair bit of pace on board at this same Lakeside race meeting after trying a fairly opportunistic move down the inside of Warren Jonssen's Commodore VK. (Schumacher wouldn't have even been able to pull that move off)
Simon managed to walk away from it but he was lucky to do so because it was a hard hit......
The footage made the Channel 7 telecast from memory.
I think the frame has been repaired and is sitting at Simon's workshop, not sure whether it is going to be rebuilt, but the car would certainly qualify for the Historic Sports Sedan category as it was first raced in 1983.