Join Date: Feb 2015
Location: London
Programs: BAEC Silver, SPG Gold, Hilton Gold, Melia Gold, Shangri-La Jade, BA Amex PP, Iberia+, Nandos Card
Posts: 1,524
All of the information you need is in the thread KARFA linked to, which is also in the forum dashboard.
You have already missed the boat with booking the standard 2 J seats that are released at T-355 so you will need to monitor availability and call to book as and when they come up.