Hello, my name is XXXXX XXXXX it is my pleasure to assist you with your question today. Did the employer formally accept your offer to remain for longer than the week's notice period?
Once you make the offer of a longer period and the employer accepts it, you are both bound by it - it would be treated as an amendment to any current contract that is in place or create its own binding agreement. So if you try and leave earlier than planned it could amount to breach of contract. Highly unlikely that they would actually make a claim against you for that but they could instead say you had resigned in breach of contract pending a disciplinary investigation
whilst no one can guarantee you will avoid this action if the employer wants to proceed with it, one possible way is to get signed off sick and use that as a reason for not being able to attend. The employer may still try and proceed in your absence though. The other option is of course just to leave as discussed above, subject to the risk of receiving a reference that states that
if a reference from them is not imperative then you may do so indeed, or even resign before that
Please let me know if this has answered your original question or if you need me to clarify anything else for you in relation to this? Thanks
yes you can do so - a mentioned it is potential breach of contract but very unlikely to be pursued by the company - simply not worth their time an money
you are most welcome, all the best