Flew from LAX>LHR and the seats on 26ABC. Decent seats with awesome IFE to keep your kid and yourself entertained for whole flight. Good space (if the forward seat does not recline back). I 'm 6ft and good space. Very clean bathrooms and roomy compare to US planes.
Going back LHR>LAX sat in 25D. great space and I didn't experience people using it as by-pass for aisle. Only downside was you had put away your IFE and tray during take off and landing. Also easy access for folks who are traveling with you and seated next to you. FYI: full flight going and coming back.