I would just start him when it suits you. Ours has been going for over a year now 5 days a week and has been off sick only twice with a temperature. He’s just not a sickly child 🤷🏻♀️
If it was me I would wait until after holiday. Only been back week or so after half term and my little one already off ill again!
He maybe fine my boy starts last November twice a week and he was sick just once. But me & dad ( we eastern European) we catch whatever he brings to home and it looks like we are not immune for those viruses ( both 15 years in uk) before my son starts nursery we never get sick.
Thanks for posting this, I have the exact quandary! I didn't think of illnesses but it is a strong consideration. I was only thinking about settling and unsettling.
There are less bugs in the summer but nevertheless I would not start right before going on holiday, there’s a high chance he may become unwell, even if it’s with a cold. The first year of starting nursery is hell for illnesses, especially in the winter.