Town are set to receive a not insignificant windfall with Portsmouth having confirmed that former defender Matt Clarke has joined Premier League Brighton on a four-year deal.
The fee is officially undisclosed but earlier in the week was reported to be £3.9 million with further top-ups believed to eventually take it up to £5 million.
Town are due 20 per cent of the profit Pompey make on Clarke, who is believed to have been valued at £50,000 when he joined them as a makeweight in the £750,000 deal which saw Adam Webster sign for the Blues in the summer of 2016.
That will see Town receive a much-needed boost of £770,000 - in addition to the £450,000 fee received from Portsmouth for Ellis Harrison earlier this afternoon - at a time when the club is facing a £9 million loss of revenue due to relegation to League One.
Barham-born Clarke came through the academy and made one start and four sub appearances for the Blues before signing for Portsmouth, with whom he spent 2015/16 on loan.
Town could also receive further financial boosts via sell-ons this summer with Webster, currently with Bristol City, understood to be interesting Aston Villa, Leicester, Southampton and a number of others and with a valuation of £12 million having been reported.
Webster, 24, joined the Robins from Town for an initial £3.5 million last summer with the fee potentially rising to £8 million.
The Blues are likely to have a sell-on of 10 per cent included in that deal which, depending on how many top-ups have been paid already, could bring in up to £850,000, although Portsmouth would be due 20 per cent of anything the Blues receive as a result of their sell-on from the 2016 move.
Meanwhile former left-back Tyrone Mings is expected to move on from AFC Bournemouth with his former loan club Aston Villa the favourites to sign him with a fee of £15 million - potentially yielding Town up to another £700,000 via a 10-per-cent-of-profit sell-on - having been widely reported.
Ex-striker Kieffer Moore, now with Barnsley, is also believed to be interesting Bristol City with a 10-per-cent-of-profit sell-on also understood to have been part of the deal which saw the 26-year-old move to Oakwell for £750,000 in January 2018.