Labour's triumph, such as it was, was to maintain its coalition in a way that generated extremely efficient seat conversion. Which is a certain kind of triumph! But different from a crushing surge of votes that the seat counts would suggest.
Its kind of a weird one in that i think they grabbed more of the center from cons and SNP, but gave up some ground on the left but they ended up with a more efficient vote (greens/other, some shadow cabinet ministers got got etc.)