I've just taken a look at the Stop Bristol Airport Expansion website. Imagine my surprise to find NOWHERE on the site where you can leave comments IN FAVOUR of the airport expansion.
What a complete load of spurious arguments they peddle, too. Hilarious how they think that stopping expansion at Bristol Airport will somehow save the planet. Perhaps them ceasing to spew hot air continuously on the subject, and stopping driving all over the South West to campaign meetings would help reduce CO2 emissions.
On a serious note, I would welcome expansion at Bristol, particularly to other regional destinations across Europe. The only thing I would add is a local public transport hub at the airport.