Squeak when cold after start up

This might sound like a thick question...
When I start my car up it's developed a squeak, it's only when it's cold and stops after about 5-10mins. Is it the fan belt? If so how do I fix it.
Any guidance would be appreciated
 
Just booked it in to get it checked (at the same time as I'm having my front pads changed! The famous front pads, fingers crossed they will be ok!