Is the alternating nap day one day nap, one day no nap as written?
I think this is your best bet so you know exactly where you are up to each day and are not worried every day if it going to be a nap or no nap day. So literally just alternate. I'm sure that was Bec's suggestion.
When would you go to this plan anyway?
You can start today. I know we are in different time zones, but whenever your next day starts
He's shown some BT resistance so it's a good time to move on with the plan.
Can you really go from a 6.30bt to a 7.30/8pm bt in one day? What a jump! I thought 15min increments?!?
This plan to alternate nap and no nap is not a normal shift of the routine such as for clock change or for gradual extension of A time. This is a plan where naps are given on alternate days, your DS is likely a less tired on a nap day and more tired on a no nap day hence the 2 different BTs. BT can jump to significantly earlier and significantly later when running a transitional plan such as nap/no nap. Don't worry most of us have had significantly different BTs like these in the plan.
I don't think we can manage a 5.30bt anyway.
Is this because it's hard to fit everything in in the evening or is it literally not possible for you due to work or other commitments?
We'd need to know if it is not going to be at all possible so we can plan something which works for you.
What time did he go to sleep in the end?