Also, BA seems to claim that both rows 28 and 29 are exit rows in some versions of their B747-400s. Is this accurate? (By this they are suggesting that nobody under the age of 16 can sit in these rows)
Looking at Seat Guru, it's only showing row 28 as an exit row on both variants.. 29 seems like a normal row. Don't go by me or that website though on all counts, I'm sure there is someone here that can confirm what you're saying realistically.