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... you are encouraged to "add an agrement", rather than indicating acceptance of the offered identification by adding the same identification.
I haven't confirmed this by experiment, but it seems to me likely that the result of you doing the latter is to unnecessarily return the observation of other people's unread carousel.
Noted, cheers for letting me know :)
Lat/Lng: 56.8, -5.2
OS grid ref: NN1074