There’s an existing thread which was started over two months ago which questions the quality of the BT Sport channels when casting from the BT Sport app. I personally have an iPad mini 2 and both a mk1 & mk2 Chromecast. The quality was upgraded to HD quality on the BT Sport app back in January and it was possible to cast all of the sport channels in HD all of the time on both of my respective Chromecasts. Around the end of July/ beginning of August, I noticed that the situation had changed. It seems to me that it is only possible to cast in HD quality now during certain sports or competitions or certain times of the day. The BT Sport ESPN channel never casts in full HD quality anymore. This despite the picture quality when just watching on the iPad itself being in full HD. I have tried various communication channels with BT to try to obtain a satisfactory answer to this question, but so far to no avail.
Thanks for your technical advice. I’m just frustrated that the BT Sport app PQ seems to vary when casting depending upon either the time of day, the sport or the competition being shown. It was consistently good from January until the end of July. Did you go for the new 3rd Gen Chromecast because you don’t have a UHD tv, and didn’t consider the Chromecast Ultra? I see that it’s possible to buy a 3rd Gen for £20 in some Black Friday deals at the moment. We don’t have a UHD tv.