We have put together a short survey to capture your feedback in terms of what BT can do when you experience home Wi-Fi issues. We would appreciate it if you could take a couple of minutes to complete a short survey. Read more from here, Fix my home Wi-Fi
Depending upon which mobile phone or tablet you have and the quality of your wifi connection you can use Chromecast.
Some BT info here
From the BT Sport app, you tap the Chromecast button, select the Chromecast device you want to use and the content is beamed from your smartphone or tablet to play on your TV. For most content, it's important to remember that you're not actually streaming from the control device to the Chromecast. Instead, your controlling device talks to the Chromecast and tells it where it can access the stream from; the Chromecast then takes over playback duties, letting you use your smartphone or tablet for any other job. However, a connection is still made between the two devices, so that you can control playback.