Yep, another problem, I do look online before posting.

So,
I launch the vu app on the phone and it does find the vu 4k easy but struggles to stream. At first takes to long to open a stream (some folders in the channel list won't even open), when happens the tv flickers once in a while or image stops and eventually box freezes and says tune failed.

My set is up Hispasat>quad lnb>2 cables to stb and cable tv to the the other tuner.
This problem only happens when launching sat channels.

Tuner A
Configuration mode-------------------------Simple
Mode-----------------------------------------Single
Satellite--------------------------------------30.0w Hispasat 30W-4/30W-5
Send Diseqc----------------------------------yes
ForceLNBPower-------------------------------yes
Force ToneBurst------------------------------yes

Tuner B
Configuration mode-------------------------Simple
Mode-----------------------------------------Single
Satellite--------------------------------------30.0w Hispasat 30W-4/30W-5
Send Diseqc----------------------------------yes
ForceLNBPower-------------------------------yes
Force ToneBurst------------------------------yes

Tuner C
FCB automatic loo through
inactive

Tuner D
FCB automatic loo through
inactive

Tuner E
FCB automatic loo through
inactive

Tuner F
FCB automatic loo through
inactive

Tuner G
FCB automatic loo through
inactive

Tuner H
FCB automatic loo through
inactive

Tuner I
FCB automatic loo through
inactive

Tuner J
Tuner type-------------------DVB-C
Configuration mode---------enabled
Network ID------------------41044
Used service scan type-----provide
Provider to scan------------virgin media UK (6952)