Most definitely do. Motto here is "never give up."
Interesting to see that this one is tagged. Since she's been in human hands before, wonder how it may have influenced the way she reacted to your presence.
Slimbridge Wetlands is a Wonderful place to visit. With both Wild and captive birds. There is a hide at Slimbridge called Kingfisher Hide where this year there have been 3 pairs of kingfishers.
Each pair have had 2 broods, it is often you see them flying past very low and it very likely this female is from one of these broods and yes I believe your right is use to seeing humans.