I'm assuming Radio 2 weren't doing their own traffic news at that point. Wouldn't think it was a fault with the bbc end of things, if anything was amiss it wouldn't work at all.
I could ask one of my control room colleagues to check with the BDM to see if there are any other complaints. There's a fair amount to upheaveal at BH and the moment. I've just spent two days in the basement surrounded on all four sides by a building site so there could be a few problems arising from builders accidentally cutting through fibers.