The Feb stats from the CAA make interesting (and generally not very happy) reading.
All UK Airports: -15%
UK Regional Airports: -18%
Then in the South West specifically:
BRS -26% (demise of Excel and Ryanair/Ezy not doing so much?)
EXT -29% (mainly Flybe presumably)
SOU -20% (mainly Flybe, or have other airlines cut routes/frequencies?)
NQY -39% (after-effects of December closure, plus no Ryanair in Feb)
BOH -10% (?)
PLH +17% (doing well on the basis of new routes presumably)