Astra crankshaft failure

On behalf on an astra owner. At 20k, failure - shocking noise from bottom of
engine when hot.
Recovered to Mr Vauxhall. The crankshaft has been diagnosed (by vaux) as
failed with 'too much play' - which way I don't know. They've offered a
crankshaft repair.
What is the failure rate of these and is there likely to be damage
elsewhere? (I'm thinking excessive end play and query top end damage if the
pistons have been allowed to flap about).
- auto if it matters (I don't know if it's petrol or smokey).
Odd, 2-3 weeks back it was in for a full service (mmm - but I've no proof).

 

Never seen crank fail on one of these.
Has it ever been run out of oil?

 

My thoughts exactly! (oil) - but I as say, can't prove it!