Thank you for your response.
Here are some examples of channels not working:
Sky Max
Alibi
Dave
Sky News
Eurosport
All BT Sport
Here is one working channel I found:
Sky Arts
In addition I have found that the parental control PIN is not recognised - it works fine on my V6 box. There is a reset option I tried which did nothing.
Further diagnostics:
Build : 4.34.0 Prod (4.34.23.105)
Device : Google Pixel C
OS : Android 8.1.0 (API 27)
Video Player : 2.13.2
OV : 3.15.15
Conviva : 4.0.11.150
Connection type : WiFi - (N/A)
Customer HH : 126795097
MQTT broker : DISCONNECTED
Device IP address : 192.168.0.97
MQTT CPE status : Unknown
Last Mqtt status check : No attempt