I would like to correct some details
12685 was never into picture of LHB.. There were repeated news about idle rake at BBQ. But it was not meant for 12685. Initial rake was of NZM-tvc express, then there was news that it will be given to TVC Mail. But in end, one fine day, ADRM PGT tweeted that 12685 will be running with LHB. There was no RB approval news or any other related to 85, it came as surprise/shock..
TVC Mail news came long before Pandiyan.. It was in hindi...
more... news paper. TVC Mail and another train(not sure which was the train)will be running with LHB. But other train got, TVC Mail didn't. Planned rake for TVC Mail was given to 85. That time, there was shortage of 3A coaches for SR, they couldn't start for TVC Mail because of that. But media has made little hangama with it, and hence 85 was given