Waiting times for FLR(FP)

Hello everyone,
I'm on the 10 year family life as a partner and mother of British children. My first 2.5 year expired in March and I filled out the FLR(FP) for renewal. I got an acknowledgement letter saying that my application raises issues relating to the European Convention on human rights which are complex in nature and so I fall outside the normal service standard. What does that mean and how long might it take for them to make a decision.
Many thanks

Akushika

It's a standard letter informing you that the HO don't expect to be able to make a decision on your application within their published guidelines. FLR(FP) applications are generally a lengthy process.

Ok. Thank you very much.

Hello everyone

Has anyone of you have got any response from Home Office regarding their FLR application.
I have been waiting from June 2016.
Timeline:
Application submitted on 12 June 16
24th June 2016: I received a letter saying European Convention on Human Right.
29th of June 2016 : Biometric done
Still waiting