Interview Letter from Home Office

Interview Letter from Home Office:
We applied a joint Tier1 Entrepreneur Extension application more than 8 months ago and decision was pending with home office. During this time I completed my 10 yrs and I made a ILR (LR) application 2 weeks ago by post.
Today we received a letter from home Office:-
We would normally decide your application within 8 weeks from date it was submitted; unfortunately this is not going to be possible in your case.
This is because it is necessary to interview you in connection with your application further details, including the date; time and location for your interview will follow.
My questions are:
•I varied my application 2 weeks ago to ILR (LR) – Do I need to attend the interview with my partner or not?
•I varied my application 2 weeks ago and application fee taken out by HO from my account last Monday, but I still did not receive Biometric letter – How many days it takes usually to receive the biometric letter after we submitted the application by post.

Thanks for your all help..

You have been creating news posts with the same question all over the forum.
Please STOP and stick to your own post on the ILR forum

indefinite-leave-to-remain/variied-tier ... l#p1608286