Originally Posted by
Aus_Mal
I recall golf umbrellas being banned a while ago ...
I remember them being banned when size restrictions were enforced at security checkpoints. Now, IIRC, security does not concern itself with size (save perhaps for the item fitting into the X-ray machine) and enforcement of cabin bag sizes is an airline responsibility - and as we know, different airlines may specify different sizes.
I have no idea what the current state of play is, because I've not tried to take a golf umbrella since then.