sorry to be the bearer of bad news, but that's not the right stuff, and it's not allowed on dukan. the oatbran in tesco is an own brand, it's in a clear plastic bag, and will probably be on the bottom shelf tucked out of the way.
it might only be available in the larger stores. have you looked online to see what it looks like?
Well thats a bad start I followed the galette recipe and used the oats I bought while I was waiting on a reply and it was gross! a very eggy consistency which I will struggle with because I hate eggs! Oh dear! Does anyone know if the "So Juicy" marinades are ok?
wait till you get the proper oatbran and have another go (or three) at the galette. there's a knack to them, and they're great when you get them right. they should be quite different to ones made with oats.