Celtic have been told that they could have had the league title in the bag had they signed Lawrence Shankland in January. The Hearts striker scored against Brendan Rodgers‘ side in the 2-0 win at Tynecastle and that goal takes his tally to 27 for the season. Given a £4m valuation earlier this season, former Hearts man and now BBC pundit, Allan Preston, has told Celtic that had they signed Shankland, their chances of winning the league would have been seriously enhanced. Preston said [BBC Radio Scotland], “And I’ve said this to friends and Hearts fans won’t want to hear this, but can they keep …