Catch up of Evil only showing in HD rather than SD

[Wilton800]

I am subscribed to BT TV and have been watching Evil from Alibi on Catch Up. The latest episode is showing that I need to subscribe and only HD content is showing the previous episodes are available in SD. I have access to Alibi and have watched catch up with other things on there from Alibi.

Really puzzled as to what is going on, any ideas? Have just had FTTP installed but can't why that would make a difference. 

[NigelB72]

It's possible that UKTV have only made the HD file available for catch-up and to access that you would need the relevant subscription through BT TV

[Wilton800]

Thanks for the response. The episode is available now.