So having bought a new car and picking it up tomorrow I decided to try and take out the Osram bulbs and put the old ones back in so I could put the Osram in the new car. This time I properly thought about it. Jack the front up, go in through the pop out in the wheel arch and it takes 30 seconds.
Pretty embarrasing I didn't do that when trying to fit them!
Saw friend who has Octavia (Mk 2) over the weekend. Turns out that it doesn't have the pop-out panels in the wheel arch but changing headlight bulbs is easy - it has a lever arrangement that moves the entire headlight unit to gain access. May be the same in the Passat - I don't know.