The Open Air Theatre is said to be "restored", but this is not strictly true. It will be re-opened but updated for the 21st century.
When it opened in 1932 there was tiered seating for 5876 with the balance made up of loose deck chairs. The official house record was 8983 in 1952, but an unofficial attendance of 11,000 was claimed for a recording of "It's A Knockout" in the mid 1960's. The stage is on an island and the local operatic society staged many successful summer seasons (usually four nights per week) often utilising the water with productions such as The Gondoliers and Pirates of Penzance. At the rear of the tier is a two storey control tower, whilst at the front are two brick follow spot boxes. One of the last performances was a sell out (estimated 8,000) concert by James Last and his Orchestra in around 1986. The stage and dressing rooms were largely dismantled in 1997 and the wooden seating (but not the concrete tiers) removed.
The current proposals involve restoring the seating with an optional retractable cover over the central block of around 2,000 seats. The stage will remain on the island but will be of a very different design. An acoustic cover will protect the performers and electrical equipment. Lighting and sound will bear no comparison with earlier times. It anticipated that the season will be fairly short each year and will encompass both visiting amateur musicals together (given the arena sized capacity) some of the biggest names in the music business (on a one-night basis).
The photo below shows the theatre from the distance. The lower portion of the tiered seating is visible and the bushes on the left are on the (now overgrown) stage area in the lake. If it comes to fruition, and I believe it will, it will be a unique venue and a major draw for the town, provided they can get the programming right!
http://www.flickr.com/photos/stagedoor/95312839/