1. Planning permission hasn't been granted. This permission is the de facto right to continue with this scheme, ie. Edinburgh Council will not object to the project in principle. It's basically a rubber stamp exercise saying "we acknowledge you want to string knitting up, so continue working on it and we won't stop you until something needs addressing (like bridge rebuilding or shouty residents)
2. The temporary compound has been granted for six months with preemptive permission, ie. if works overrun, the compound permission can be extended. Having the compound will also help with other drainage works, and given the land isn't expecting another user until 2024, it's always easier to extend planning permission while already in place than to ask for it retrospectively.
3. Any plane low enough to hit the wires will already be low enough to hit the 15ft boundary fence, and the quite tall approach lights to the east of the runway. The airport did put in a challenge to the wiring, but this was subsequently withdrawn one NR told then where to get off.
4. There are four overbridges that need attention. The first two are a lanes near South Queensferry, neither open to heavy traffic. Main Street is a footpath, and the farm lane off Standingstane Road is only open to access.
Three is the Glasgow Road (A8) overbridge near Gateway station. That would be impossible to demolish and start again, but while building Gateway the track was lowered slightly, and therefore surge arresters should be sufficient.
Four is the bridge on Ladywell avenue.
All these are solvable without demolition from what I've heard, and surge arresters seem to be the way to go, with certain important people at NRScot paying close attention to the trial in Cardiff.
