The 35-year-old strik­er, who re­mains a free agent af­ter be­ing re­leased by the Ham­mers last sum­mer, has been train­ing with the League One side as man­ag­er Nathan Jones looks to fill the fi­nal spot in his 25-man squad.

Sources in­di­cate that the pro­posed deal on the ta­ble from The Val­ley hi­er­ar­chy would be struc­tured on a pay-as-you-play ba­sis un­til the end of the sea­son.

Such an agree­ment would mit­i­gate risk for the club while giv­ing An­to­nio a plat­form to prove his fit­ness.

An­to­nio has not fea­tured in a com­pet­i­tive Eng­lish fix­ture since a hor­rif­ic car crash in De­cem­ber 2024. The in­ci­dent left the pow­er­ful for­ward with mul­ti­ple leg frac­tures in what was de­scribed as a near-fa­tal ac­ci­dent.

De­spite the sever­i­ty of the in­juries, the 35-year-old made a re­mark­able re­cov­ery to rep­re­sent the Reg­gae Boyz at the Con­ca­caf Gold Cup last June.

Since his re­lease from West Ham, An­to­nio has been ea­ger to re­sume his ca­reer in the UK, hold­ing talks and train­ing with both Brent­ford and Leices­ter City. How­ev­er, po­ten­tial deals with the Pre­mier League sides failed to ma­te­ri­alise.

Should he put pen to pa­per with Charl­ton, An­to­nio would bol­ster Jones’ at­tack­ing op­tions sig­nif­i­cant­ly.

As a free agent, he is el­i­gi­ble to be reg­is­tered out­side of the trans­fer win­dow, and he would join a for­ward line that al­ready in­cludes Lyn­don Dykes, Miles Leaburn, Char­lie Kel­man, and Mat­ty God­den.