Thanks a lot PETER01 and Globaliser. Agreed - wish I'd found that thread first. My apologies for poor searching skills on FT (honestly, I did try).
For the third time today, I'm changing my seat selection! 13AB it is (although I do like the sound of 15AB given the marginal extra space, and more than anything, the fact there will be no "headset grabbers"! Those people are the bain of my very existence!)
Thanks again!