Veteran winger Edwards has joined on loan from Ipswich while midfielder Williams has completed the two-match ban that meant he missed the defeats by Leeds and Birmingham which dumped Millwall to the foot of the Championship.
But DJ Campbell cannot face his parent club, Nicky Bailey (back) and Jermaine Easter (thigh) are likely to miss out again while Danny Shittu has been ruled out for the rest of the season with an Achilles injury.
Boss Ian Holloway has allowed striker John Marquis to rejoin Northampton on loan.
- Sports & Recreation
- Jermaine Easter
- Nicky Bailey
- Danny Shittu