Devices don't stay connected to wifi when not in use - can I update settings?

[Cheek]

I've moved house recently, and on the new Sky hub, devices such as my work laptop and my internet radio don't keep a persistent connection to the wifi like they used to on the old system.

For example, I can work happily all day on my laptop, but if I leave it to run some code for a couple of hours without being active, the wifi connection drops and I lose the progress.

The radio used to always come on straight away, but now takes a while to connect.

My impression is that this is just a setting that needs tweaked rather than anything going wrong, but I can't see any options in the Hub pages.

Anyone any ideas?

[Cheek]

Further reading makes me think it's something deep in the settings, but I'm uncertain.