Freeview info

Good sites:

Lots of info on how UK Freeview works, how MUXes are structured and which channel is on each, and info on the 700 Mhz clearance programme:
https://www.aerialsandtv.com/knowledge/digital-freeview-tv#700mhz-clearance

TV Signal strength info and advice:
https://otadtv.com/digital_tv/signals.html

UHF Channels and corresponding frequencies :

UHF channel numberFrequency (MHz)
21474
22482
23490
24498
25506
26514
27522
28530
29538
30546
31554
32562
33570
34578
35586
36594
37602
38610
39618
40626
41634
42642
43650
44658
45666
46674
47682
48690
49698
50706
51714
52722
53730
54738
55746
56754
57762
58770
59778
60786
61794
62802
63810
64818
65826
66834
67842
68850

Azure AD and SAML single logout POST binding

As of September 2020, Azure AD does not support the HTTP-POST binding for SAML logout requests.

AD FS supported both HTTP-Redirect and HTTP-POST, so this means that not all apps on AD FS will be able to migrate to Azure AD successfully.

If your relying party only supports the POST binding, Azure AD will ignore this, and send the LogoutRequest via a GET request anyway (if a logout URL is specified), so this will likely cause an error in the relying party if they are not able to process the GET parameters.

See suggested feature, which I recommend you upvote if this is functionality you need:
https://feedback.azure.com/forums/169401-azure-active-directory/suggestions/41283820-support-post-binding-for-saml-logout