That's odd. When I've been in BE, I thought the menu had been different for breakfast - filet and potatoes/eggs, I think - although I guess the last time I left Europe at breakfast time in BE would have been almost year ago when I was on a 9am flight out of LGW.
I was in Y last week LGW-ATL (915 departure) and it was french toast or eggs....I would have taken BE lunch anytime over that.

I usually prefer the lunch/dinner options over the breakfast ones.
I looked at the BE info on dl.com and it did not say anything about breakfast.