As I wrote in terms of "numbers" the routes are performing well source CAA. Yield is much harder to calculate and unless you know someone on the inside this information would be kept pretty close to any airlines chest
To be honest it is quoted on pprune rather a lot that " yeah load factors are good but what about yields ? " . On the BHX thread some of Flybe's French routes out of BHX (where Flybe are the sole carrier on the route) had a LF of over 90% for the whole month of August so unless Flybe's reservation system sells EVERY ticket at a loss (which it obviously doesn't ) then you can be pretty sure that Flybe are making money.