Strange noise from steering

[eyelight]

Mine does the same thing, it doesn't appear to have got worse over the last year of ownership, and the fluid is at the right level.

Thanks.
This car has just gone through a Citroen pre-sales check so should all be fine.
Make the noise more when turning the wheel right. Only a little noise when turning left.
Sort of a hissing noise. nearest thing I can compare it to is a CD skipping or spinning round but not playing.