Good evening @larkiedarkie, I hope you are well.
If you have a BT Sport subscription you can definitely watch it. If you haven't already, you can sign up for a free 3 months trial of BT Sport here.
The great news is whilst you will get 3 months of casting (to the TV) and the app for free, once the trial is over you can have just the app for £5 a month, if watching on your iPad is okay with you. Casting will be +£10 a month after the trial period ends.
I hope this helps, if not please reply so I can try to help further.
Take care and enjoy your evening.
by Redsim Monday