brian_dromey is correct. Over the last 25 years the British (and most other nations) have favoured unbundling of costs. This is known in the trade as Two Tier Pricing and was introduced, I understand, by the Gilette razor blade company when they made the basic razor cheap and the blades expensive!
Ryan Air has perfected this system and it works. I agree that it can be irritating to have multiple small payments when you are in a hurry but it is not going to change. The younger generations have grown up with this FR style of pricing and do not think it so unusual. It is older generations who experience the transition, that are irritated by it. But it will not change in the next 25 years.