Sh1n (@hey_itsmyturn) reposted the following notice from UKMTO (@UK_MTO):

UKMTO WARNING 194-26

Click here to view the full warning⤵️
https://www.ukmto.org/-/media/ukmto/products/20261103-ukmto_warning-194-26.pdf?rev=c098958c69da492084f0995fa3dee6bc

The UKMTO post included the hashtags #MaritimeSecurity and #MarSec.