whistling/squeeking noise when rurning right at a roundabout

Hi guys,

today driven to the Darkside to collect EGR cooler delete hose and there are many roundabouts as you get nearer to them. Noticed the whistling (first time I thought it's the car next to me). is it a bearing? It happens mainly on fast ish roundabouts, quite loud whistle, only when turning right.

I guess it will be the passenger side as that has the full load on at that time. What and how to check please?

Cheers,

Mike