Peugeot 206 steering clonk

[red_dwarfers]

My girlfriend has a 2002 Peugeot 206 2ltr HDI 90bhp.

While driving it last night a clonk suddenly developed when turning the steering wheel. No loud clonk to start off with and not gradually either.
Doesn't relate to particular places on the steering wheel
Occurs while stationary and moving
Occurs whether the engine is running or not
No resistance on the steering wheel
Putting my ear around both sides of the car it appears to originate from the centre rather than the wheel arches.

I didn't have time to look properly last night and won't be able to until the weekend, any ideas?

[myglaren]

Might it be the UJ for the steering Kev?

[RichardW]

Could be - I'd also check for a broken spring and / or seized strut top bearing (although the later is more of a 'twang' as the spring whips round).