Goals from Les Ferdinand and Michael Carrick either side of the break proved to be our undoing and Ledley held his hands and conceded that it was his half-clearance that led to the second goal.
"It was very disappointing," said the defender. "We just didn't seem to get ourselves going.
"We went 1-0 down, came in at half-time and said we needed to lift our game. To be fair, it was a poor clearance from me that led to us giving a second goal away and we didn't react.
"We were ready to come out and have a go at them after half-time, but we were hit with the second early and it kind of killed us. It was difficult from there."
While naturally despondent in the aftermath of defeat, Ledley agreed that it is vital for the team not to dwell on the result with sufficient games remaining to achieve the aim of European football.
"Yes, there is still a lot of games left and we've got to pick it up from here and get back on the winning track."
Ledley King attempted to make no excuses for the below par performance against West Ham at Upton Park on Saturday.