I can see the UKTV network continuing for many more years to come. As long as their channels are hitting the marks they need to keep them successful, any speculation of the network closing is wrong.
Just remember, in 2017 the UKTV network recorded profits of £91 million! So I have a feeling the network is here to stay.
There is no speculation of the network closing. The network is due to split as this thread has made clear.