Without going into the background (e.g. here), there are various draft Gross Misconduct clauses available on the internet, but nothing tailored towards nanny/au pair contracts.
So here are my bullet points:
- Negligence: any negligent act or omission with the potential to endanger the children
- Breach of confidence: disclosure to or discussion with any third party of any information relating to the children or the employer or the employer's family unless required for the perfomance of the duties or specifically authorised by the employer. Pictures or details relating to the family must not be posted on any blog, forum, social networing or any other public or private web site whether anonymously or otherwise.
- Drunk driving: driving a car belonging to the employer at any time while unfit through drink or drugs
- Alcohol/drug abuse: intoxication or incapcity through use of alcohol or drugs while on duty
- Illegal drugs: posession or use of illegal drugs [while on duty or in the home/at any time]
- Violence/abuse: violent or abusive behaviour to any person
- Theft
- Willful or reckless damage to property
- Computer/internet/technology misuse: use of any equipment or service provided by the family (e.g. WiFi, broadband, mobile phone) to access any pornographic material or for any illegal act
- Any other act or omission which may reasonably be considered by the employer as gross misconduct
- [Insubordination: failure to comply with any reasonable instruction given by the employer - I personally don't like this one as it sounds officious and antiquated and if any non-compliance were serious enough not to be dealt with as an ordinary disciplinary matter it would be covered under the previous catch-all]