Duffy joins Brighton's big push as Vale sign Paterson
Republic of Ireland international Shane Duffy has joined Brighton from fellow Championship club Blackburn Rovers.
The 24-year-old defender from Londonderry - who hit three own goals in two matches before scoring at the right end in his final Rovers game last week - has signed a four-year contract with the south coast club, having moved for an undisclosed fee.
A member of the Republic squad which qualified for the Euro 2016 finals, Duffy has also played for Yeovil, Scunthorpe, Burnley and Everton.
Brighton boss Chris Hughton said: "I'm delighted that our perseverance has paid off and we've completed the signing of Shane. He's an excellent addition for us.
"He has a lot of experience, having played in the Premier League, Championship, Europa League and international football. He's a very good defender, and alongside our existing options he now gives me four quality senior options for the two central defensive positions."
Meanwhile, Northern Ireland international Martin Paterson has become Port Vale's 16th signing of a busy summer for the Sky Bet League One club.
The 29-year-old striker, who had a brief spell in America last year, became a free agent following his exit from Blackpool at the end of last season.