For some reason the national recorder for slugs thought I’d used a photo app to identify this slug, which I’ve never done. Maybe he just assumed everyone uses them these days, and, in this case, he was ‘afraid the photograph app which you have used has led you astray’. The truth is that I’d googled, and searched various online websites, and couldn’t work out what this slug was so had just recorded it as one of the Arion species. I even managed to get that wrong – turns out this is one of the Three-band slugs (though, I have to admit, I can only see two bands) and ‘At present we cannot tell which of the two species it is without dissection so it has to be recorded just as Ambigolimax‘. I’ll know for the future.