Derby have signed 36-year-old Everton defender Alan Stubbs on an 18-month contract and goalkeeper Roy Carroll from Rangers until the end of the season.No fee is involved for Stubbs, who has made almost 350 league appearances in England as well as more than 100 in all competitions in Scotland. Stubbs joins a club marooned at the bottom of the Premier League and seemingly destined to be relegated after just one season in the top flight. Manager Paul Jewell believes Stubbs' experience will be invaluable as the Rams aim to bridge a 12-point gap to safety. Jewell told the club's official website: 'It's a terrific capture for us. Stubbsy is a first-class pro, someone who has been there, seen it and done it. 'I'm delighted to have him on board and he will add experience and steel to the backline. He will train with us on Friday and is very much in contention for a place in the team on Saturday.' Carroll finally arrives at Pride Park following a delay while the Scottish league leaders searched for a replacement keeper of their own. The Rams initially thought they had signed the 30-year-old Northern Ireland international last Thursday but the move went on hold as Rangers boss Walter Smith looked to sign another keeper. Now that the Glasgow club have snapped up Scotland international Neil Alexander from Ipswich it has enabled Carroll to make his move. In turn, Rams stopper Stephen Bywater is in talks with Ipswich over a move to Portman Road. Rams manager Paul Jewell expressed his relief on the club's official website, saying: 'It has been a protracted deal but I believe it will be worth the wait because Roy is a great pro and he will come straight into contention for Saturday's game at Birmingham.' Stubbs began his career at Bolton where he made over 200 appearances in a six-year spell during which he captained the Trotters to the 1995 League Cup final as well as a play-off final victory over Reading. After a season in the top flight, Stubbs moved north of the border to Celtic in a £3.5million move in 1996, where he won two league titles but also had to overcome testicular cancer. Five years later he returned to England to join his boyhood favourites Everton on a free transfer where he spent four years before moving on to Sunderland for just six months when he returned to Goodison Park in January 2006.