Channel 4 kicks off Great British Bake Off sponorship battle, as reports circle that bids could hit £8m

Advertisers looking to dine out on the popularity of The Great British Bake Off may have to stump up as much as £8m for a sponsorship deal with Channel 4, according to a report in the Guardian. 
The paper claims that the broadcaster is looking to recoup the expense of the reported £75m it paid the BBC for the rights to the show, which won't move to Channel 4 until 2018 due to a contractual issue between its maker Love Productions and the BBC. 
Channel 4 is not believed to h