Well I've received my replacement strap from Blackrapid.
Seems to hold the E-5 and 14-35mm combo, with no problem.
Fingers crossed so far so good.
Must say thanks to Blackrapid for their "rapid", excuse the pun, reply to my concern. No questions asked they just sent me a new strap, and didn't even require me to return the old one, well done Blackrapid.