http://www.pprune.org/forums/showthr...ental+airlines
This is not new 'news'.
The above link to an old PPRuNe thread will tell you more about this possibility.
Bristol would not extend its runway for one destination (far too political locally) and the airport says it would not need to for Newark.
If it is to be either BRS or CWL (I stress 'if', because it might be neither) it will undoubtedly come down to commercial considerations on the respective routes.