Our bonnet seems to be slightly out of alignment (at the weheelarches) when closed.
Is there an easy way of adjusting it?

Geoff, can you give a foto for us to assess please?

Having searched other threads I tried opening the bonnet and "slamming" it shut from about a foot.
It now looks a lot better!

The bumper is adjustable - up/down and back/forwards. There are two bolts inside the wheel wll which can be accessed by taking the wheel off.

i noticed on the R56 ones the gap looked a bit large when new, havent seen many since new. Still want one though

Same problem. I noticed that there was a larger gap on the left bonnet over the wheel, as Geoff suggested, a heavy bang down. and Ola! its fixed! ;-)