I wouldn't send a confirmation message - it's up to them to confirm at/before the agreed cut off time and if they don't then their booking is cancelled.

If they're late and haven't let me know they're held up, I'll start getting changed at the time the booking was supposed to start; I would give somebody I knew a little more grace (and if a punter is travelling on the Underground, since they can't get in touch and update me) but if it gets to five minutes after and they still haven't been in touch then I'll start texting my stand bys if I have them and packing up if I don't.

If they keep me posted then I'm fine to wait, but if I have something else on after then it'll come offf their time. I'm not messing other punters around even if the delay isn't their fault.

I would wait 10 mins if no contact made I then text
Your booking now cancelled.
Some would call say they were running late I'd give allowance then .
But the rate of timewasters was so bad i became very negative and had no tolerance  I would block them also if they never bothered turning up.

I get them to text me to confirm 1–1.5 hours before the booking, so I know to get ready. No text and I assume no booking. If they do confirm but don't show up or contact me, I write them off after 15 minutes.

My current incall location has a set of roadworks nearby that can cause delays so I usually give 15 mins right now. But if I'm on tour its 5 mins.

When it gets to 10 mins I'll try to call them but only if I don't have someone to replace them or a backup plan of cooking food 🍲

This happens really rarely since I started using a confirmation text system.

I give them 15-20 minutes which is probably a bit generous compared to others. .

I'll give them that long provided they've kept me posted and I know about it (and also assuming they realise that it's coming out of their time), but unless they're coming from two doors down they'll have known they were going to be late at least ten-fifteen minutes before the booking time so that would make it a good half hour they would have had to get in touch.

I suppose a few might really think I'm just going to sit quietly and unquestioningly waiting for them to wander over however late they are, but not many and in my experience if they have had some catastrophe on the way the genuine ones still usually manage to let me know at some point. Tbh my main problem is them turning up early, but that's another thread .

Tbh my main problem is them turning up early, but that's another thread .

Oh absolutely this - I always include in my 'instructions' text not to turn up more than 5 minutes early. I absolutely hate it!!

I ask everyone other than long term clients to confirm via text either an hour before or 1.5 hours depending on my day. I always say at x time sharp. Not earlier, not later, at the time given. I then send them car park details. Once they're parked I send walking directions. I give everyone 10 minutes grace, unless they've let me know they're running late. For the most part, those who haven't got in touch are no shows..