A balloon festival – sounds like fun. That was the origin of the Bristol Balloon Fiesta, first launched in 1979. A group of friends in a pub, too much alcohol and a load of hot air. The result – twenty five years later - Lots and lots of hot air.

The Bristol Balloon Fiesta, at Ashton Court, is now one of the biggest outdoor events in Europe, attracting balloonists from around the world.

Mass launches are planned at 6am and 6pm on three consecutive days. Because balloons travel with the wind, in theory at least, they should all travel at the same speed, making collisions impossible. But, of course, the pilots can go up by releasing hot air into the “envelope”. So, its possible to bump into another balloon that is directly over head. Since balloonists can’t see what’s above them, the Highway Code of the skies dictates that the uppermost balloon must take responsibility for avoiding balloons popping up from below.

So, is it cold up there in the wind in a basket hanging from a balloon? Beyond the normal chill factor associated with any English summer’s day the wind makes no difference. The balloon travels with it. In the basket the air is still, much to many people’s surprise. It’s more of a float than a flight.

Balloons vary hugely in design. We’ve all seen the in ya face “I’m a rich bastard and I’m going to advertise my company over your house” type balloon. Fortunately, these are rare compared to the many beautiful or indeed wacky balloons that regularly take to the skies. Rabbits, a lighthouse, a Tyrannosaurus Rex, the sky is your oyster if your wallet is deep enough.

These wacky designs are heavier and take longer to fill than the conventional shape, but the final effect is all worth while.

Bristol Balloon Fiesta is at Ashton Court Thursday 9 – Sunday 12 August