As per the notam, the crane was only lit at night. was it illegal ? no, probably not, but it was damn fool thing to do
But that is where the regulators need to re look at these temporary structures.
They are harder to see than solid buildings with lit up rooms.
Their spindly structures tower way above the skyscraper type buildings often in colors which blend in with grey skies and mist.
Yet all they require is one measly red light many which appear to be either not working or not bothered with.
The regulators need to look at spaced lighting up the arms and some sort of strobe device on the top! Whether Flarm could play a part I do not know.
The regulators also need to have these lights on temporary structures lit at all times! They are as much need in gloomy cloudy days as at night.
Remember it was such a Crane which brought an aircraft down because the pilot did not see one arm angling off it.
The building developers make £Billions out of these tall buildings proper public safety with the Cranes is a drop in the river Thames in cost.
Would it have saved this pilot we will never know but MAYBE?? Having them as they are certainly did not!