Bristol-Brighton week

Recently I've been reading an interesting book on the history of the Clifton Suspension Bridge. Toward the end there's a section on how different lighting has been used to illuminate the Bristol landmark over the years. It's there that I came upon this statement: "...in 1933, for Bristol-Brighton week, the bridge was illuminated by 1,500 electric lamps."

Naturally, I was interested to know what Bristol-Brighton week was. There are few mentions on the internet so it looks as though I need to do a bit more research (of the kind that involves books and libraries) but from what I can tell it was some kind of twinning event that took place in Bristol between 17-24 June 1933. For the duration a daily air service operated between the two cities. A Pageant of Bristol procession wound its way from Queen Square in the city centre out to the Zoo in Clifton and:

"The licensing justices allowed an extension of hours until 11 pm. A delegation from Brighton arrived by air and during the week the largest air pageant outside Hendon took place at Whitchurch. Buildings were decorated and illuminated and there was a gymnastics demonstration by 3,000 children on the Rovers ground."

I can only find references to this one event in 1933, though a few months later, Brighton held it's own event:

"Brighton reciprocated the 'twinning' with Bristol by holding a Brighton Bristol Week in September. The Lord Mayor and other dignitaries visited and there was a Bristol Art Exhibition and an opportunity for local industries to display their products."

I'm interested to know how and why this event came about. Looks like I'll be taking a trip down to the Reference Library sometime soon...