For the past couple of days I've noticed that when I travel above 30mph I hear a sort of clicking noise coming from the osf wheel with the window down (4.4v8 2003 vogue). It's as if I have a card in my spokes! I do get a slight wheel wobble at around 50-60mph and now my brakes have developed a squeal.

After reading the horror stories of diff failure I'm not sure if it's the beginning of that, but the again the noise only happens above 30mph, with diff problems wouldn't it be from the start of the drive?

Any ideas? I'm changing my brakes and discs this week so I'll see of that cures it. Hoping and hoping its not the diff problem!!

Give the lower suspension/control arm a good shake and see if there is any movement at the ball joint. When the car is jacked up and supported, give the wheel a workout top to bottom and side to side, there should be no noises or wobble.
Remember and put loads of copper grease on the back of the brake pads and clean the slides. Mine squeal like crazy without enough copper grease. All obvious, but worth double checking.  Previously..
Vogue SE TD6
Defender 90 2.4
Defender 110 TD5
Vogue 3.5 EFI

Cheers, I'll have a look this morning - its a good job summer has arrived for outdoor work