Your email earlier today refers. You state that you have been granted entry clearance for a period of 6 months only. Our computer system automatically defaults to 6 months duration, and it is up to the issuing officer to change the validity. Unfortunately, this was not checked at the time of issue. Can you please submit your passport (there is no need for another application form) to the Visa Application Centre, and I will arrange to have your visa reprinted with the correct dates which will be from the new date of issue to 28 February 2007.
I apologise for any inconvenience caused to you, and will inform the visa application centre that you will be re-submitting your passport shortly.