I am Pakistani national , and currently I am holding Ireland's ICT professional visa and I also have UK's multiple Visit visa which is expiring on 21 Jan 07 . At a moment I am in Pakistan , I want to extend my departure date , and I have consult my relevant air travelleing agency and they told me next flight available to me is only on 21 Jan 07 .
In my return route I have to get my flight to Dublin from London airport ,
Now my question is can I get transit on the basis of my UK's Visit visa ? ( which is expiring on same day on which I have flight from Lahore ,Pakistan

I will arrive at UK on 22 Jan 07 , so is it possible that I could get relaxtion of one more day on my uk visa ?

Thanks,
ZINC