In reply to MischaHY:
FWIW I think you did the right thing.
In similar vein..... A couple of Christmas holidays ago my wife and I walked along from Cairngorm over the N corries and were descending the shoulder from Lochain. It was very cold (minus 18 that am in Aviemore). We saw a figure traversing right to left along the path below the routes on the main cliff above the slab. He (or she) was moving VERY slowly, say a couple pf metres in a few minutes, stopping regularly. I started to worry that this was a cold person on the edge of hypothermia, trying to get up and go but failing to keep moving. I said to my wife that we wpould keep on descending as we would have aline of sight for some time, and see what happened when we hit the Corrie floor.
The figure was now mostly stationary for most of the time, occasionally moving a short way but then sitting down again.
I decided to call 999 as I was not in a position to leave my wife on her own and could not have done much if it was an emergency, plus it would take more daylight to get up to the individual and assess things and it was well past one thirty.
I called, got Police, they took my number and MRT called me, asked quite a bit about me ( I guess to see if I was likely to be reliable as a judge ), and said they had a chopper in the area and would check it out. Chopper duly arrived, landed, checked the situation with us, flew up when we had confirmed everything, came back a few minutes later to say the chap was sure he was OK, not a problem.
I started to say sorry, but was very nicely stopped and told if ever in doubt, do what you did, far better for them to assess and know about things than not.
So, I felt better about having called them, as a post above says, better to call it in than risk spending the rest of your days thinking "if only" .