Hyndburn does have the food festival run by Hyndburn Leisure, which does attract 100's of visitors.
As to the Firework Competition in Blackpool ... you have to remember this coincides with the Illuminations and probably 5 displays over the month. I don't think that if it were standing alone at a different time of year would have the same interest, except with locals nipping down to the Central Pier to view. It does, also, start around 7.30 > 8.30 p.m. and persuading market stall holders to stay open until after this time could be extremely difficult.. although some shops do remain open a little later for our Christmas lights ceremony.
Suppose, like the Romans, we could always build an arena and throw a few councillors to the lions ... that would attract...
