Carry a full lock out kit on the van, I have 5 or 6 locks, several types of mcb lock tags and multi hasps, tags, cable ties, pen, all in a girlie red bum bag!
I tend to leave it in the van, it just comes in handy to keep things together.
Comes down to the areas in which you work, I may have to lock out in a completely different building to that I am working in.
I did not design the installs, I probably would not run final circuits into another building, prob run a sub & put a board in there but there we are, it's what I have to work with.
Hence why I have lock outs.
Also it is a stipluation of some of my customers, if I am not in control of the means of isolation, that is I cannot see it from my workplace it has to be full LOTO.
I don't have a problem with this as its me that would get fried if some numpty re-energised.
BTW MM, my LOTO kits came from my local Ed branch a while back!