BBC Radio 4 can be streamed here, including internationally: https://www.bbc.com/audio/play/live/bbc_radio_fourfm
Or
mplayer 'https://a.files.bbci.co.uk/ms6/live/3441A116-B12E-4D2F-ACA8-C1984642FA4B/audio/simulcast/dash/nonuk/pc_hd_abr_v2/aks/bbc_radio_fourfm.mpd'
vlc 'https://lsn.lv/bbcradio.m3u8?station=bbc_radio_fourfm%22&bitrate=320000%22'
For other readers, please be aware that only BBC World & BBC Radio 4 can be streamed outside of the UK.
For about a year now, BBC has been aggressively geoblocking other radios.