The packaging is what you can see on the eBay listings - just a slipcase with four slim DVD cases inside it.
The shows do have their original openings, and it would appear that they're original PAL copies, although I haven't looked closely enough to be certain. I shall put a disc in the player later and report back
It's actually a little suspicious that the UK, US and Australian releases all have the exact same cuts. It could easily be a coincidence that the music rights were unavailable (or expensive) for all three countries. But there's always the nagging possibility that Disney simply took the edited masters prepared for the US release as their starting point rather than trying to clear everything.
I have to admit, I'd be very very surprised if the UK release in particular had the exact same rights issues as the US. In general, music clearances seem to be less of a problem over here - Muppet Family Christmas, for example, and the Quantum Leap boxsets. These have been hacked to pieces for their US releases thanks to music rights, and yet they're uncut in the UK.