NOTAM?
Living quite close to Yeovilton we see low flying helicopters.
Just up (literally) the hill from us (at a ground height of maybe 140m) there is a lerge crane preparing to lift a new bridge into place over the next few days. I've just noticed (as it gets dark) there is a flashing light on the tip of the crane. I wouldn't like to guess the height of the crane but is stands well above surrounding trees.
Question - does this require a NOTAM or is the flashing light enough?