Either Central's studio has gotten larger or they've just invested in a new wide angle lens.
The ending wide shot at the end of tonights programme made the studio look a lot more huger than usual.
It's been discussed on here before (from memory) that Central's studio is a less permanent setup that other regions with one side of the set on castors so the other businesses within the Gas Street studios can access the larger doors to get larger items into the building.
Not quite, Studio W/E (W was always larger) were created in 2004 by chopping the only studio at Gas Street in half and obliterating the CITV half of the studio. There were larger (not quite scene dock) doors on both sides. All of the regional sets have panels on castors to allow for inventive presentation.
Zeiss have moved out of Studio E (now called B) - can't see the owners of 22 Gas Street letting Central knock through. They're looking at letting it out as a TV studio.
Oh it's such a perfect day, I'm glad I spent it with you...