The Blues look set to receive a third sell-on windfall of the summer with Brighton and Hove Albion widely reported to have made a £20 million - plus add-ons totalling a further £5 million - offer to Bristol City for ex-Town centre-half Adam Webster.
Talks between the clubs are said to be ongoing with the Seagulls confident of landing the 24-year-old, who would become their record signing.
Webster joined the Robins from Town for an initial £3.5 million last summer with the fee potentially rising to £8 million and some of those top-ups are almost certain to have been paid over the course of last season.
TWTD understands the sell-on clause in that deal is just below the previously reported 10 per cent, while Portsmouth would be due 20 per cent of anything the Blues receive as a result of their sell-on from the 2016 move which saw Webster join Town and Matt Clarke move to Fratton Park.
Therefore, Town appear likely to receive an initial sum just above £1 million mark with further cash after top-ups.
Bristol City had put a price tag of £30 million on Webster, but even in an inflated market it appeared very unlikely that they would achieve anything approaching that figure for the ex-Pompey man, who has never played in the Premier League.
Town have already received one sell-on windfall from a move to Brighton this summer via Clarke's switch from Portsmouth with the Blues believed to have yielded £770,000 from that switch.
Tyrone Mings’s move from AFC Bournemouth to Aston Villa for an initial £20 million plus potentially another £6.5 million saw the Blues receive £1.2 million now with that windfall potentially reaching £1.85 million.