How can I select my favourite channels and display them in the TV Guide?

Yes!  You can customize your TV Guide to show only the channels you would like to appear.  
 
iOS (iPhone/iPad) & Apple TV
From the main menu, select settings and scroll down to Favourite Channels.  Select the channels you would like to be included in your favourites.  
 
Once complete, press back to return to the previous screen, and select Channels Filter.  Choose favourite channels, and press back on your remote to exit and save your selection.  
 
Only your favourite channels will now appear in the TV Guide.  
 
Android TV
From the main menu, select settings and scroll to Preferences, and select manage favourite channels.  Here, select which channels you would like to favourite.  
 
Once complete, press back to return to the previous screen, and select Subscribed Channels.  Choose favourite channels, and press back on your remote to exit and save your selection.  
 
Only your favourite channels will now appear in the TV Guide.  
 
Android Mobile
From the main menu, select settings and scroll down to Favourite Channels.  Select the channels you would like to be included in your favourites.  
 
Once complete, press back to return to the previous screen, and select Channels Filter.  Choose favourite channels, and press back on your remote to exit and save your selection.  
 
Only your favourite channels will now appear in the TV Guide.  
 
Amazon Fire TV
From the main menu, select settings and scroll to Preferences, and select manage favourite channels.  Here, select which channels you would like to favourite.  
 
Once complete, press back to return to the previous screen, and select Subscribed Channels.  Choose favourite channels, and press back on your remote to exit and save your selection.  
 
Only your favourite channels will now appear in the TV Guide.  
 
Roku
From the main menu, select settings and scroll down to Favourite Channels.  Select the channels you would like to be included in your favourites.  
 
Once complete, press back to return to the previous screen, and select Channels Filter.  Choose favourite channels, and press back on your remote to exit and save your selection.  
 
Only your favourite channels will now appear in the TV Guide.