Heelp updating new Honor 6+ PE-TL10 from 4.4.2 to 4.4.4 (3UK) topic

Hi
I have purchased the Honor 6+ from 3 UK.
Currently my installed rom is as folows:
Model Number PE-TL10
Build Number PE-TL10V100R001C900B141
Android Version 4.4.2
Custom Version CUSTC432D141

Fully Stock / Unrooted

I am looking to upgrade to 4.4.4 stock unrooted.

I have tried the B160 update from this page http://www.needrom.com/download/honor-6-4g-pe-tl10/ but the update always fails.

Any Idea what I'm doing wrong or the file I should be using? Also this pages says that Gapps are not incleded, does that mean I have to root in order to flash Gapps through a custom recovery?

Thanks