Not sure how I can say this, but there is absolutely no £5 check in fee...at least not for EU nationals. There is a £6 fee if you want to jump the queue, but as of yesterday, there is no £5 on line check in fee. There also wasn't when I used them to go to Ireland in June, or Italy last September. Actually, I just went through the process again, and definitely no check in fee.
John, you will only get the £1 and tax free flights on certain days. Never on Friday or Sunday evenings. You need to be flexible to find the right fares.
Vicky