They've all gone, except for Littlehampton.
I found that if take anything to a tennis court or something similar, first I get hounded by kids asking how fast and how much, and not long after it's the fun police because someone complained about the noise.

I've used the circled area in the Adelaide airport precinct many times on weekends. It's clean, really flat concrete, and grip is quite reasonable. Great for running motors, and just doing a tune up. I don't use the road, as traffic will come out of the blue, so stick to the apron area. It's about 60 metres long, so you can get up a good head of speed.
Sometimes I'll go there at night with electric cars and bikes. It's also away from prying eyes, so no kids hanging around asking how fast it goes, or how much it costs, and I have never been asked to move on from that area.