voiced interdental /l/

Paul Carley has found a video in which Ed Miliband pronounces the words "Labour" and "Let's" with a voiced interdental /l/.
Miliband says
1. "Labour plan for Britain's future"
2. "Let's make it happen together"

no. 1: "Labour" (credit: BBC News)

no. 2: "Let's" (credit: BBC News)