Gill Sans  Suggested by fmontpetit 


Keep Calm  Suggested by marty666 
Keep Calm And Type On  Suggested by marijnkampf 

the real font is here, yours is just a copied design with an """almost similar font"""

FYI, Keep Calm Medium is free for Personal Use

This must be Gill Sans, although the K is a little different. Perhaps they used Gill Sans Std with an outline to emulate Gill Sans Medium?

It's most likely Gill Sans which I a close but not quite good match to the original Keep Calm poster's hand drawn font. You could use my Keep Calm and Type On font. It has both the crown and the upside down crown included. I've specifically designed it to match the font from the original Keep Calm poster.