Just got the following information in an email. Guess Ryanair isn't finished digging for gold.
European Traveller Warning - Happy New Year from Ryanair!!
Until now Ryanair have not charged for customers booking with a Visa Electron card. However, from January 1st this card will also also incur their £5 fee. Customers using all other credit and debit cards are currently charged £5 per passenger per flight meaning that a group of four people have to pay £40 for a return trip even if the booking is made on the same card in a single transaction.
No doubt this latest charge will create more public anger as another charge is added to Ryanair's long list of existing ones. Fortunately there is a way around it. Ryanair have stated that they will allow online bookings at no charge using a MasterCard Prepaid card. This will be the only credit or debit card that can be used on their website without a fee.
Probably the best of these Mastercard prepaid cards is the FairFx Anywhere card which charges 1.5% per spending transaction and doesn't charge for adding to your balance by phone or by debit card. There's no credit check carried out when you apply for the card but you might have to wait for upto 10 days to get the card as there are many new applications since the Ryanair announcement. Be sure to order the correct card as there are a range of very useful products available for travellers on their website.