Ofcom have released their statement describing how they will release the spectrum freed as a result of analogue TV closedown.
As expected, they intend to take a market-based approach, but with the exception of PMSE:

"The exception to our market led approach is for PMSE, which already uses interleaved spectrum on a large scale. This is an extremely diverse community, and we do not think it would be able to take part effectively in an auction, creating a serious risk of market failure. We will therefore hold a beauty contest to award a package of interleaved spectrum to meet PMSE users’ needs."

The full statement can be downloaded from here.