Application Timeline
Eligibility criteria: 5yr Work Permit + 1yr ILR & Spouse (Joint Application)
Method of application: NCS Hammersmith on 29 Jan 2013
Date of receipt by UKBA: Did not check this, but NCS said it would be 30 Jan 2013
Date of debit of fees: Payment taken 1 Feb (Friday), but cleared my account 4 Feb 2013 (Monday)
Date of receipt of acknowledgement: Letter dated 1 Feb 2013
Date of receipt of approval: Letter dated 26 Feb 2013 (post only arrived 8th March 2013!)
Date of Ceremony: 1 May 2013 @ Hounslow Register Office (this was the earliest date)
Other Updates:
I started stressing when I read these posts as it appeared as though the lead time for approval was about 3 or 4 weeks. Take in to consideration that they send post out with a second class stamp. It took 8 working days for the post to be delivered! You would think after paying a small fortune for the application, they could at least send it 1st class. As it turns out I am glad it arrived on a Friday, as there is no way I could have made it through a working day today. So happy!! Just the ceremony to go now..!
Also, if doing ceremony through Hounslow Register Office, you may want to read this post:
http://www.immigrationboards.com/viewtopic.php?t=128973