Strange noise from the wheels

[Redmaestro]

Driving home from work yesterday, I could hear a strange squeaking noise which sped up and slowed down with road speed. I never heard it over 10mph but its very intermittent. I haven't been able to find out exactly which wheel its coming from yet. Braking seems to stop it but they squeal anyway!

My first thought was a wheel bearing but wanted to ask on the forum incase it could be something else.

Any thoughts? Thanks in advance