Constitution Affairs Secretary Angus Robertson. Photo Colin Mearns A BID by the LibDems to block Angus Robertson from becoming a member of Nicola Sturgeon's Cabinet failed after Holyrood backed the appointment. The Scottish parliament gave its seal of approval to the new Scottish Government ministers in a vote on Thursday. The LibDems objected to Robertson being appointed as a minister, saying they do not support the role of Constitution Secretary. However their motion failed to gain the backing of any other parties and it was defeated in a vote by 70 to four. Robertson, a former leader of the SNP's Westminster group, returned to frontline politics when he was appointed as the Scottish Government's Constitution Secretary on Wednesday.