Have a read of this, DebsyDoo. Having done this on a similar Zafira B it's up through wheel arch access panel as suggested. Tip: Peer into front of headlight lens before dismantling and note orientation of bulb when correctly sat in its holder. Two springy (sort of) plastic clips hold wheel arch access panel in place. You will need a torch or a sunny day. Once...
It's an 07 plate, yeah seen two versions on YouTube, one where they took the whole front bumper off & the other which said that you have to go in via a panel under the wheel arch ! - Really ???
With the cars we have at the moment the only one I've needed to change a bulb on has been a BMW 320 and that was via a removable panel in the wheelarch!
Having done this on a similar Zafira B it's up through wheel arch access panel as suggested. Tip: Peer into front of headlight lens before dismantling and note orientation of bulb when correctly sat in its holder. Two springy (sort of) plastic clips hold wheel arch access panel in place. You will need a torch or a sunny day. Once access panel is dangling on its thin plastic straps up inside you will see a rubber cover over back of bulb holder. Peel this off. Before you twist off bulb holder (about a quarter turn anti-clockwise from memory) I suggest you photograph / draw the orientation of bulb holder and wiring from behind before you remove old bulb. On the Zafira there is enough slack in the wiring to withdraw bulb holder and wiring back into wheel arch to take out bulb. I spent a good hour trying to get the bulb holder back in place even though I thought I had a mental note of its original position. As you are doing most of it by feel it can be a nightmare. I once watched a guy on and off doing same task at a Premier Inn one afternoon on an Astra H and he was still doing it as it got dark! My Vauxhall garage said whatever you do don't force it as it's been known to damage headlamp and bulb holder will keep falling out. It's a bumper off job to take headlight out to repair it.
The bulbs are supposed to last for at least 10 years, that is the theory anyway. So they can stand being hard to change.
There are some models of Citroen (I think, but might be Renault) where you have to take the front wing off!