I'm sorry to say that I've heard when they charge (rather than do it under warranty)they charge big.
I've heard the opposite - that they basically charge about £80 for labour and don't charge you for parts, so long as the serial number of your camera is within a batch that they know was affected.
They won't say this explicitly, as the official line is that there is not an official problem. But rather a lot of people have got them repaired out of warranty for way less than replacing the lens unit would normally cost.
This is sort of what I've heard too. Fingers' crossed.
This is sort of what I've heard too. Fingers' crossed.