Sorry for all the questions but I was trying to figure out why certain Tab E's were running Stock L 5.0 and others like yours running KK 4.4.4 but sadly it was a waste of time as the Tab E's running L5 were locked to carriers.
You are running the correct version of Sky Go and your Tab E is running the correct OS and as long as your Tab is stock there is no reason as to why you can't use Sky Go.
Not sure what Sky Package you have but are you able to use the Sky Sports and/or Cinema apps????