Why does that have to be at Heathrow?
It does not, but for point to point. LHR is the place serving West London and every business to Bristol via Reading along the M4 corridor. easyJet want a part of that market I understand, and why not.
Hub connectivity is useless without a strong p2p market with some possible exceptions like DXB and Emirates where postion and critical mass win the deal. It's a free market guys, if we expand LHR we improve regional connectivity to the world as well as improve P2P options to local business and leisure. They come together, easyJet and BA, sitting alongside Aer Lingus strong on London terminating as well as feeding Air Canada.
Flybe is the best bet for the likes of LPL which could offer business a good deal for a premium.