[ExxKA]

It doesnt seem like a normal ceasar or ROT algorithm. I am trying it as a "playfair" algorithm at the moment but that seems like a dead end aswell.

[GaryRowe]

Probably not Playfair since there are repeated digraphs.

[gazza126]

I've tried caesar shift using Q as E (based on frequency) so M is A but that failed epicly... also tried a viginere using GCHQ as the key word but again failed epicly :L Not even bothering with Playfair. simple letter to Ascii doesn't work either and i really can't be bothered with going stupidly complicated :/