According to the Highways Agency roadworks database:
Roadworks - Bridge Repairs
The M6 southbound will be closed between junctions J14 and J13 due to bridge repairs, between 7:15 pm and 6 am, from 11 December 2013 to 23 December 2013.
The northbound closure and resulting diversion through the centre of Stafford has been causing chaos, so expect the same with this one, it’s going to be carnage if they’re closing it every evening at 7:15pm 
highways agency 