Record the accident in the accident book and pay special attention to the dates and times recorded to ensure they are accurate. Compile a report to go with the report detailing the full circumstances of the delay in recording the incident and make sure the late reporting is clearly recorded as down to the injured party. Carry out what investigation you can and record all the facts about it. Then wait to see if there is a claim. Do your part in the reporting and investigating aspects of this case and you will not go far wrong in the eyes of the law. PS if you do find anything out of place that could have caused to accident, record it as found and record what action you take to prevent a repeat (that shows you have actioned anything that should have been done as a result of the accident and prevents another arising).

IMHO: If your company allowed her to have 11 weeks off whatever the alleged cause) without chasing it up, you probuably deserve all you are going to get. She has been watching afternoon telly all sponsored by the ambulance chasers. Let her fill in the record , you start compliling history. Contact your insurance co.

Not sure I'd go as far as Walker, record and investigate fully. Just because her knee 'popped' while at work doesn't make the injury 'work related'..