JC, British Airways currently have close to a monopoly on domestic/connecting air travel in the UK. Historically Flybe has served its own market, providing connections to Europe from the southwest and P2P flights between smaller UK cities. However, since Virgin and Stobart got involved they’ve been toying with making Flybe their feeder airline. Virgin’s codeshare with Delta has massively expanded their route network, and adding connections from the UK to that network is what they need to tackle BA’s stranglehold of the UK market.
BA has no true competition anymore, not since they bought out BMI. Virgin seems keen to break into their territory, and Flybe is/was their vehicle to do so.