From the mouth of BA crew!
Rows 10 and 11 are the emergency exit rows. 10 will not recline, 11 does so go for that.
On the G-BUSx a/c all but last 4 rows are club configgable so have 34 inch pitch so all the way down to row 21.
On the G-EUUx a/c I think the club connfiggable seats go down to about row 18.
Enjoy