 Sclare was elected to the executive of Leeds Trades Council, and as the union expanded, it offered many new facilities to members, including a Labour Hall, kosher food, burial, and prayer facilities.In both 1907 and 1908, he led strikes against piecework, both proving partially successful.A further strike in 1911 led to arbitration which improved the pay and conditions of the union's members, and membership had reached 4,500 by 1915.