On another messageboard:

https://www.vintage-radio.net/forum/showthread.php?t=224804

an individual in Wiltshire claims to have received Spirit Radio on 549kHz recently (the night of 23 January apparently). Was the poster just seriously mistaken?, or might there genuinely have been a brief recent transmission of Spirit on 549 kHz, before disappearing again, as I can find no trace of anything in Ireland on 549 !