Morning!
Yes, i'm in Hampshire. Hot here too yesterday, although not brilliant sunshine, bit cloudy but still hot. I'm surprised its not raining where you are...thats what it usually does in scotland isnt it? lol.
Hmmmm, if he's doing short OT naps then no, I wouldnt stick to the longer A time, try reducing to say 3hrs 20. I know my lo was very sensitive to this, and at one point 3hrs 20 was magic, 3hrs 30 was OT hell, so it really can be that much of a fine line. If you want an A time of say 3hrs 20, and he falls asleep within 10 mins, then yes put him down at the 3hrs 10 mark. And yes, try to sort one nap at a time.