Criggion VLF Station was a transmitter operated by BT on behalf of the MOD. It was built during World War II as a back up transmitter. It operated with the callsign “GBZ” and on 19.6KHz. The transmitter was 600ft high and t was used to send messages to submarines until April 2003, when it was shutdown. The transmitter was dismantled in August 2003. I had wanted to go here for some time but was massively dissapointed. The little that remained of the site has been completely trashed and left open to the elements.