When boarding at Gatwick I was charged twenty five pounds because my luggage weighed 5kg over the maximum weight of 20kg. I find it completely unfair that there was no pre-warning of the maximum weight. There were several other passengers who were also forced to pay charges and whom were all also unaware that the maximum weight of luggage was just 20kg. Incredibly, there is a sign which reads " weight restrictions apply within reason". I do not believe that a twenty five pound charge is reasonable for 5kg. If Easyjet wish to be so strict with these rules then why don't they make it clear to flyers that this is the case? I suspect it is so they can make hundreds of pounds a day from their customers who simply do not have a choice in the matter. I think it is only fair that customers should be informed of the rules prior to their flights so they have the opportunity to ensure they do not go over the restrictions. To let people arrive at the boarding gate then tell them they are carrying too much is a totally unfair system. After all, the flyer can hardly do anything about it once at the gate.