This has nothing to do with whether or not Ed Miliband's partner breastfeeds, wanted to breastfeed, didn't want to breastfeed, could breastfeed, couldn't.
Nothing.
Her choice is her own business.
But Ed Miliband chose to bring this into the public domain, and chose to highlight the brand he used. The BBC chose to show this bit of the sequence and then to 'enhance' it with a close up of the branded formula.
I have no idea why the BBC did not spot this unusual bit of free advertising and avoid it.
I can imagine that Ed M has been told /decided to use the fact he is a father at all opportunities - we have to be reminded of why he has been Mr Invisible since his election as leader... 'cos he's been on paternity leave, the lovely man, see? He's so normal and cuddly and involved as a dad! We've had refs to it at PMQs, we have had an official portrait released to the press, and now we have him pointing out infant formula in Tesco's.
It is free publicity to Aptamil; it does undermine breastfeeding promotion efforts - not by much, of course, but it adds to it.
It's not acceptable.