@HydonRachel72
Buffering is caused by a lack of throughput of about 10Mbps for HD and 25Mbps for UHD to the TV concerned via the route you use whether wired or wireless. If you are connected by wireless then you need to ensure it is in range of the router wireless system preferably over the 5Ghz wireless band as 2.4Ghz is usually poor and may have throughput issues dropping the speed below 10/25Mbps respectfully for BBC iPlayer HD/UHD.
-------
Zen internet on FTTP (900Mbps down, 100Mbps up). SAT> IP (Apple 4K 2nd gen TV to LG C1 OLED UHD TV/Dolby Atmos Denon AVR, DacMagic Plus for Hi-Res audio), hosting own blog/forum (cluster), OPNsense & Zenarmor L4/L7 NGFW & DPI IDS/IPS, Asus ET12 Pro Tri-Band wifi, Linux, Gamer: Xbox Series X/i7 laptop, round-robin DNS over HTTPS, non-proprietary VoIP HD AMR-WB (G.722.2) and more... Beta tester Apple iOS/watchOS/tvOS/iPadOS/macOS.
