Midfielder Flynn Downes has completed his move to Swansea City, signing a four-year deal.
The 22-year-old is understood to have moved for a fee in excess of £1 million with some reports putting the figure as high as £1.5 million potentially rising to £2 million.
Downes, had been training with Town’s U23s since the start of pre-season having made it known he wants to move on.
The Welshmen appointed former MK Dons boss Russell Martin as their new manager last week with Matt Gill as his assistant and it seems likely the ex-Town first-team coach has played a role in the decision to recruit Downes from the Blues.
As reported last week, AFC Bournemouth recently ended their significantly advanced interest in the former England U19 and U20 international, while Town turned down an offer from Peterborough earlier in the summer.
Last summer, Town rebuffed bids of £1.2 million and £1.6 million from Crystal Palace for Downes, who was effectively contracted to the Blues for two more years with his deal up next summer but with the club having an option for a further season.
Having joined the academy aged just seven, Brentwood-born Downes make precisely 100 appearances for the Blues - 75 starts and 25 sub appearances - scoring three goals.
The fee takes Town's incoming fees to around the £3 million mark this summer with Andre Dozzell having moved to QPR for £1 million, Norwich having paid £600,000 in compensation for Liam Gibbs and Lincoln having paid what we understand was £220,000 for Teddy Bishop.