Automating turning on a media_player

I have written this code within my automations.yaml file, saved it and rebooted the RPi that my HA is running on, why does the Automation not show up within my Configuration / Automations page? :flushed:

I am not sure if I have got the syntax wrong, or something else is preventing it from “running” …

TIA

- id: '1603995851450'
  alias: Kitchen Sonos ( On, 07:00)
  description: ''
  trigger:
    platform: time
    at: 07:00
  condition: []
  action:
  - service: media_player.turn_on
    entity_id: media_player.kitchen
  - service: media_player.volume_set
    entity_id: media_player.kitchen
    volume_level: 0.2    
  - service: media_player.play_media
    entity_id: media_player.kitchen
    media_content_id: https://www.bbc.co.uk/sounds/play/live:bbc_radio_fourfm
    media_content_type: channel
  mode: single