Yorkshire Carnegie squandered a strong position midway through the second half to slip to their sixth defeat of the Championship season.
Carnegie led 20-8 but conceded two late tries and saw their hopes of at least hanging on for a share of the spoils thwarted when Peter Lydon converted London Scottish’s second try with the last kick of the game.
“It is very disappointing, we got ourselves into a position to win the game and we did not close out the match,” said head coach Bryan Redpath. “There have been occasions when we have lost games this season for the same reason and we have to find a way through that issue.”
Scottish led 8-0 after a scrappy opening, with Robbie Ferguson releasing Lydon to score down the wing after he had earlier scored a penalty.
Carnegie’s catch-and-drive produced a response through a penalty try that saw Tinus du Plessis sin-binned for Scottish, with Keivin Sinfield’s conversion bringing them to within a point at the break.
Another lineout assault resulted in a try for Charlie Beech, and a conversion plus two penalties from Sinfield appeared to put Carnegie in control.
Scottish responded from a lineout drive of their own with Mark Bright scoring with seven minutes to go. Lydon’s conversion made it a one-score game.
Carnegie lost Ryan Burrows to the sin bin and after winning a scrum in the final minute, Jason Harries scored in the corner.
Lydon held his nerve to snatch the victory for the hosts.
Carnegie’s Pete Lucock said: “We know what we need to do. We controlled the game for long periods but did not see out the win. We’ve got Cornish Pirates next and they are always tough so we need to bounce back quickly.”