Thanks MrsdeVere and admission, all hypothetical as DFD is year 11, I'm just interested, so thank you anyway.
It's not an SS arrangement so even if DFD was a year younger she wouldn't be covered under the new rules.
What really makes me angry is that according to the rules, my foster daughter lost out on a place at the "outstanding" school with good results and no "major problems" by a couple of metres. In all previous years, she would have been allocated a place. As it was, she lost out and ended up at the crappy school where she was influenced by certain characters and went majorly off the rails. I know that parents try to avoid the school she's at however they can, so there is no doubt in my mind that parents attempted what the OP proposes. I'm not saying my foster daughter lost out on a place at the good school to the child of someone like the OP, but it's a definite possibility.
Now, had she lived closer to the crappy school and further away from the 'good' school she'd been in catchment for all years previously, she would have gone to the crappy school according to the rules and there would never have been any question about it. I accept that. But the fact is that according to the rules, fair or not, any other year she would have been within catchment for the good school, and it's highly likely she lost out to someone renting to get into the good school, because of the contrast between the two schools which became dramatically worse in the couple of years leading up to her parents having to apply.
I'm not saying that the rules are fair, but I am saying that she could have been robbed of a place at the good school by a parent breaking the rules which are in place. If DFD hadn't gone to a school with a drug problem and with excellent pastoral care like the good school (her parents haven't been interested in her for a long time), she may well have not gone off the rails like she did. I'm not saying she wouldn't have done, but due to the environment she would have been in, it would have been less likely.
I accept that parents just want to do what's best for their kid and don't care about breaking the rules, but this is how it looks to the parents on the other side of the fence. It's equally crap here too.