Bedford TK Brake issue
 

Hi. My Bedford TK has developed a break issue. Firstly, I have no mechanical knowledge or skills whatsoever. My TK is a mobile pub. When I drove it into a field 7 weeks ago the brakes worked but now the pedal has no resistance at all and no working brake. The hand brake (air brakes) work ok but not the pedal. What should my first check be? Urgent help required and gratefully received. 👍