Sammie Szmodics scored twice for Posh and whilst Sam Hoskins briefly raised hope with a penalty, Jonson Clarke-Harris converted his own spot-kick to seal the deal. Here are our player ratings from London Road...
9. Mark Marshall
There were times when he looked lively and threatened to cause problems in the final third, but those moments never really turned into anything substantial... 5
10. Sam Hoskins
Good composure to convert another crucial penalty, confidently drilling down the middle, but clumsily felled Thompson which effectively killed Town's chances. Excellent play to force a decent late stop from Bursik... 6
11. Alex Jones
Fit enough to make his first Cobblers start and he looked sharp from the get-go. Some nice touches and clever movement gave Posh issues, and lively work to win the penalty. Town's slim survival hopes may hinge on his fitness... 7 CHRON STAR MAN
12. Caleb Chukwuemeka
Bright again as a second-half substitute, though played too far from goal to really trouble the home defence... 6