Bolton have signed winger Robert Hall on a three-year contract from Premier League club West Ham.
Wanderers are still in talks with West Ham over a compensation package for the teenager after his contract recently expired at the Boleyn Ground.
The 19-year-old, who can also operate as a striker, spent the final weeks of last season on loan at the Reebok Stadium and featured on the final day against Lancashire neighbours Blackpool.
An England youth international, Hall has previously enjoyed loan spells at Oxford United, MK Dons and Birmingham City before joining up with Dougie Freedman's side.
Haworth, 24, who began his career at Blackburn and has also played for Rochdale, Bury, Oxford, Bradford and Falkirk, has agreed a six-month deal at Meadow Lane.
Meanwhile, 22-year-old Labadie, who made 29 appearances and scored two two goals last season, has signed a new one-year contract.
He told the club's official website: "I'm chuffed to bits because it's been going on all summer and I can kick on now and concentrate on the season ahead.
"I want to build on last year, play more games and I want to score more goals and do as well as I can for Notts County Football Club.
"I'm 22 now and I want to be playing every game and I really want to make a name for myself this season."
The 21-year-old right-back, who was most recently playing for Icelandic side Valur, has agreed a one-year contract at the Broadfield Stadium.
Town manager Richie Barker told the club's official website: "Right-back was a key position for us when it came to adding to the squad and we're delighted to have James on board.
"He's a terrific defender but he loves to get forward and fits the template of player I want in our squad - someone who is young, athletic with a willingness to learn and improve and a terrific attitude."
