LGW to MCO on 18th May poss upgrade?

Hi,
This is my first post so apologies if i'm posting in the incorrect place.
I'm travelling from LGW to MCO n the 18th may on VS027
with husband and 2 boys, would like to upgrade from cattle class to PE, but only if i can go upstairs. does anyone know how full this plane is? do child upgrades be the same amount of the adult? Either way what are the upgrade prices please (was fortunate enough to travel club traveller on BA to mexico last year and really cannot face going back to cattle class!!
)
Also does anyone know the likelyhood of this being one of the new planes, i've checked the past stats and seems like only about a 25% chance, but wondered if anyone had any more info?
Also in standard cattle class does anyone know what will be on the menu's?
thanks in advance y) , and sorry about the amount of questions!
Vikki
This is my first post so apologies if i'm posting in the incorrect place.
I'm travelling from LGW to MCO n the 18th may on VS027


Also does anyone know the likelyhood of this being one of the new planes, i've checked the past stats and seems like only about a 25% chance, but wondered if anyone had any more info?
Also in standard cattle class does anyone know what will be on the menu's?
thanks in advance y) , and sorry about the amount of questions!
Vikki