Welcome to the forum. Are you trying to watch on an iPhone/iPad? If so you need to download the NOW TV app from the App Store and use that to watch, it won't work in the browser.
I’ve downloaded the Now player on my iPad but Safari cannot find true web address. Any ideas?
Are you trying to watch NOW on your iPad ?
If so, you don't use your internet browser and need to download the NOW App from your IPad Apps Store.
Further information on this linked article below how to install the NOW App on your iPad.
Perfect - thanks for your help!