LONDON — Manchester United have had a rocky ride under Ole Gunnar Solskjaer but there are signs that they could finally be turning the corner after completing a memorable league double over Manchester City. The Norwegian appeared to be bringing the good times back to Old Trafford when he took over from Jose Mourinho last season but their stunning run of results proved a false dawn. This season has also been a difficult one for United, who are a scarcely credible 37 points behind their historical rivals Liverpool in the Premier League. There have been high points, including an opening-day thumping of Chelsea and a 2-1 away win at the Etihad but some desperate lows, with defeats against West Ham, Bournemouth and Watford. But there are genuine signs of recovery under Solskjaer, with United now unbeaten in 10 games in all competitions and at last playing with purpose and