Just had to have a tyre replaced because of a slow puncture. It looked almost new - fitted 2014 but we only do about 2000 miles a year - but had a dink where something had pierced it and the fitter said it wasn't likely a repair would be successful. The previous tyre on the same wheel had to be replaced because it had a nail embedded in it.

Am I just unlucky, are some tyres more prone to being punctured by debris, or are some roads more prone to having sharp debris on them?

When I bought a new car in 2009 I had 3 punctures in the space of 12 months. I haven't had one since. It really is just luck - but be careful that the usual places you park don't have nails and sharp object laying around.

Like in a garden centre or supermarket near to where they are dismantling pallets etc.

What are your tyre pressures like?

2.3 front 2.7 rear I think.

Presumably inflated to manufacturer guidelines and regularly checked?

Yes, as per the label inside the door.

Most common reason for slow punctures is kerbing and potholes - especially on low profile tyres when you're ;likely to damage the alloy wheel at the same time.

Nails? Just be careful when passing a joiner's van or in a B&Q car park

Yup. I've been popped at a B and Q car park. I always park in the busiest area now and not where the vans are.

I only deal in PSI.

33 and 39.

Never mind, it's not the end of the world. You can buy pressure gauges that have a dual scale.

My digital tyre gauge switches between Psi and Bar (and something I can't even remember) just by pressing the button. It was only about £5 a few years ago.

I think tyres might have something to do with it as well. A friend of mine had a merc B class recently and they were getting punctures every few weeks.......the longest the car managed to go without changing or repairing a tyre was a month.
Anyway, they got rid of that car and replaced it with a BMW 2 series - this was about 6 months back, and have not had a single puncture yet.
Seems a bit more than coincidence to me.

Some of it's luck (or lack of it) but there's also an element based on whereabouts you drive on the road.

If you drive close to or in the gutters then there's a greater chance of a puncture because that's where a lot of the debris ends up. Ditto if you cut close to traffic islands. Next time you're out and about and it is decent light have a look; you'll see rough-looking patches of road near junctions and other road obstacles. That's where broken glass, nails and other detritus ends up. Avoid driving over those areas and you'll reduce the likelihood of a puncture.

Another factor is whether you pass areas where there's building work going on.

I thought the 2 series came with run flat tyres anyway! My sister's certainly has them

Well they might do but you still need to replace them if you get a puncture.

One thing I’ve learned over the years when it comes to tyres and punchers and that is keep well away from the tradesmen entrance/exit at B&Q as there are always loose nails laying in the car park near that entrance.

Agreed.
Where you live, drive, park, how you drive, quality of tyres.
I don't park near skips as nails and screws around. Dad looks out for screws at the DIY stores especially wickes as many traders go their open van doors and out drops a screw. I've seen people drive, hit kerbs, drains through big pot holes without a care, cheap tyyes old cars/tec, but some of it is luck as well.