If Bernardo goes, then BDB will just do what he did last season when called upon.
Yeah, I'm not wholly convinced we'll sign a LB/LWB. If the right player becomes available at the right price, then maybe, but I don't think we're going all out - even if Bernardo leaves.
As you say, we have BDB to step in. Roberts can play there and there's Cochrane in the wings too. I also wonder whether he might experiment with Izzy there in an U23 or cup game