Further to my post re Flybe fare to Knock, I have now downloaded and printed the ticket details etc.
It turns out the "Base Fare" is £6.00! The balance, £43.29, is made up of "Taxes & Fees".
And that £6.00 "Base Fare" is fare for a round trip, so £3.00 each way. I do understand the 'loss leader' concept but £3.00?