GBH without intent S20 is a serious charge , You NEED a solicitor quickly. You say you can't afford one but the reality is you can't afford not to have one. If the case had been referred up to Crown it means they are considering a jail term.
Sentencing guidelines here, you need to scroll down to section 7 & 8,
as this has gone to Crown it must be cat 1 or 2 , so minimum 1 year in jail.
It is even worse for the Landlord if you mean he is a pub landlord,any conviction for assault means he automatically loses his license to serve alcohol and therefore his job.
GET A SOLICITOR NOW !!!!