Visited CWL today for the first time in years, and I can quite understand why there are Welsh accents flying from Bristol.
Apart from a wider selection of routes, and better timings, another problem is Rhoose's inaccessibility. I know Lulsgate is a bit off the beaten track, but the drive from the M4 must have been 15 miles, round lots of roundabouts, through at least one residential area, and much of the route speed limited either by statute or quality of the road. And then you join/leave the M4 quite some way west of Cardiff. If I lived in Newport or further east, I think my most convenient airport would be Bristol.
Sorry boyos!!