It was an ITV series which isn't a streaming service, as such.
You may be able to access the Radio series though which is well worth a listen.
https://www.bbc.co.uk/programmes/m000jf7j
I have some relatives who tried out ITVX for the first time especially to watch the drama, which they didn't catch as it was broadcast. They reported that ITVX was almost unusable, and also that the app crashed their telly and caused it to lose the ability to output sound until they rebooted the telly and let it go through an update cycle. "BBC iPlayer is much better." came the grumble down the telephone. (-:
I told them that it was ITV, which has 4 channels and is almost bound to repeat it.
