Thanks for the new link Mike.
They have moved the page about a bit, I used to read the comments last year but didn't look far enough down the page to see tham this. I didn't know about the direct link.
I was watching the cameras most of yesterday and I went out to do some gardening for about an hour, had a look and all three were in the box. Took the cuttings to the tip and when I got back about 12:10 there was only two in the box. I never left the room after that until tea time. Looking at the write up I can see why the timings were out as I did see three in the scrape after I had posted. When I retired there were definitely two. The write up explains why. Sometimes it is hard to know where the chicks are as the fly from one side of the box to the other and because the page refreshes whilst the chick is in the air it looks like it has gone, only for it to appear at the other side. Sometimes it appears that there is an extra one for the same reason. I'm off to look at some of the piccies now.