Toddler Napping

[Cheeseycheeseycheesecheese]

DS is 21 months and is a really good sleeper.
He condensed his naps from two to one a while ago. He usually sleeps for around 2/2.5 hours, but over the couple weeks or so he's been sleeping for about 3 hours up, nursery commented on it last week asking if it's becoming a regular occurrences home, well I guess it sort of is now.
They've said they've no concerns as he is developing on track and still getting 11/12 hours a night. I'm just wondering if the extension of time is normal at this age?
I've read a few napping threads but I can only really find nap refusal over extra snooze...

Any advice?

I wonder if you should get your sons iron levels checked and their vit D levels?

Maybe worth a phone call to a GP.

That's probably a good shout, I'm deficient in both and have to take supplements. Hadn't considered I'd pass it on, thank you

As long as night time sleep stays in the 10h-12h range, I would not worry. Mine all slept for 3h plus (and about 11h at night) right through to past 4th birthdays.

Sounds normal to me.

Did you manage to get a doc/nurse app for bloods?