Some cars can be a complete nightmare! A Corsa being a prime example (So I have heard, I woulden't own one!)

Look behind the actual headlight unit, if you see any like spring clips then at least you know you don't have to remove body parts etc. This is the conventional Ford method, you then remove the panel and change the bulb behind, this sounds easier than what it is as access can still be tight by my experience on modern Fords!

Martin