I believe I have answered this. Please refer the below URL;
If this link doesn't work, I re-produce my reply below.
Hello and welcome. Thank you for providing an opportunity to assist you.
From what I understand from your situation, it is YOU who is supposed to be contractually bound with the company who you work for. The company that you work for requires YOU to abide by its private account policy.
Having said this, you do not need to take / submit any trade requests for this. You are not required to do it. Let me explain.
The trades that you are going to put will be in your ltd company account who is a separate legal person / entity in the eyes of law. Further more, you wife would be trading and no trades of her would be initiated because of any inside information passed on by you. I do not think your ltd company account traded by your wife falls under the purview of this private account policy.
I am sure this would help.
You may please leave a positive rating if this helps as this is the only way we are compensated for assisting you. Alternatively, you may revert back with a reply if you need further assistance or if I have missed out on any aspect of your question.