Jacob
The condition that the ticket has to be purchased via the FR website is hardly an unfair, or unjust, condition. Easyjet probably has a similar condition in the T and Cs. Is it unfair or unjust that FR have a 15kg bag limit while BA have 23kgs?
Preduk
Slight drift from the topic: no one is suggesting that the FR condition is illegal in the first place.
WHBM
I don't dispute that the purchase in the UK is protected by UK legislation, or that FR have to abide by national laws, regardless of which country they operate, but how many people actually bother to read through the T and Cs for anything when they make a purchase?