Thorne, 32, has completed a free transfer from Cardiff - but City must pay £200,000 if they are promoted to the Premiership within two years.
Defender Louis-Jean, 29, agreed to join earlier in the week, in a deal which saw Gary Holt join Nottingham Forest.
Midfielder Jarrett, 25, is moving on a free transfer from Wigan.
Home~RS~a~RS~Domestic~RS~q~RS~~RS~z~RS~28~RS~){kind=small}
MMIX
E-mail this to a friend
Printable version
Match of the Day - Post-match interviews