When asked about late transfer business, Holloway said, "There's already one! Earnshaw's gone from Derby - already - to Charlton, which seems ludicrous to me.
Pressley looks to be joining on loan from the Scottish champions after choosing a move to Parkhead over The Valley in January. He has failed to become a regular starter for Celtic though, and boss Alan Pardew may finally get his man.
Another man linked with a return to SE7 is Manchester City right-back Danny Mills. Mills played for Charlton from 1997 to 1999 before joining Leeds and with French star Yassin Moutaoukil injured for a month, Mills may be brought in on a short-term deal.