Dont Hang Up As far as I am aware - they have never made any secret of what they do. Yes, there are trap doors and yes other carriers have also introduced them. Yes, I also only use FR as a last resort.
BUT there is a reason their 'headline' prices are so low! No company can [say] transport people across 350 miles for £45 each way and make a profit. So they don't do that. They have to charge extra and they have proven that customers will go for [say] '£45 one way' and not '£175 all in'. if FR had not invented this way of doing business - someone else would have done.