I know this is an american example but it got me thinking how many people would know why a service dog wanted your attention or what to do? I found it on twitter
(twitter.com/lissalet/status/1008087816604127234?s=09)
I know most people think of services dogs as guide dogs or prehaps hearing dogs but theres an increasing amount of epilepsy, autism or dusablity assistance dogs. I just wonder if this applies in the uk (i suspect it does) and what you'd do.