Anonymous ID: 49cb56 June 27, 2018, 11:48 a.m. No.1927567   ๐Ÿ—„๏ธ.is ๐Ÿ”—kun

Well this is interesting:

 

If communications links run by the Post Office had failed in the 1980s, the Ministry of Defence codeword to activate military support was TWITTER