Portsmouth boss Harry Redknapp is set to bag Reading fullback Nicky Shorey.
Leyton Orient will bank £450,000 due to a sell-on clause.
Reading boss Steve Coppell left Shorey out of the 1-1 friendly with Aston Villa on Saturday.
Coppell said: "Nicky has made it clear he'd prefer to move and ply his trade elsewhere.
"I am 60 per cent certain Nicky will be gone by this time next week."