Luton have made their ninth summer signing following the arrival of winger Danny Green.
Notts County have signed Togo international Mawouna Amevor on a two-year deal.
Tony Pulis has been installed as Sky Bet's clear favourite to become Middlesbrough's new manager following Tony Mowbray's departure.
The former Stoke boss heads the betting at 7/4 followed by ex-Aston Villa chief Martin O'Neill (6/1), Nigel Clough (10/1), Fabrizio Ravanelli (14/1) - a former Boro star - and Roberto Di Matteo (16/1). Pulis had previously been the early favourite for the Derby job, vacated by Clough, which went to Steve McClaren.
Mowbray was relieved of his position on Monday in the wake of Saturday's 3-2 defeat at Barnsley, which left Boro with a solitary win in their last 10 games and saw their Sky Bet Championship relegation odds cut to 6/1.
Sky Bet football trader Chris Spicer said: "Tony Pulis is the natural favourite for any Championship vacancy given his record of transforming Stoke into a solid Premier League outfit, but it remains to be seen whether he would be a popular choice among the fans given his brand of football.
"We installed him as the 5/2 favourite initially and have cut his price slightly to 7/4 as he attracts more money than any of the other candidates on our list."