If your planning on getting those extra legroom seats the price has gone up to £12.50, or £17.50 for the Tenerife, Las Palmas and Arrecife.
The forward cabin is prob the best place to sit, if the flight isnt full then for some reason the forward cabin is always a bit quieter than the front, so you may have room to spread around. 2abc is noramally a good option as its not always and extra legroom seat but sometimes has a bit extra space, but again it depends what aircraft you are on as there are a few different variations.
What route are you flying?