Sony Catchup TV Apps (UK) - Compatible Versions for SideLoading


I've recently got a Sony Bravia 4K TV (I say TV, its actually a large screen without a tuner). Strangely the My5 app comes preinstalled, but the likes of iPlayer, All4 and ITV Hub aren't installed, and they aren't available via the Google app store.

I know how to sideload apps, as I've managed to get the iPlayer working (via a fluke apk find on the net), but I'm struggling to get Android TV/Sony TV compatible versions of the other catchup apps.

Does anyone know where these can be possibly downloaded from?