The presumption of innocence is paramount in the British justice system and in my opinion the current system is designed to incentivse remand prisoners to plead guilty to offences which may not be proven to the criminal standard i.e. beyond a reasonable doubt.
I have personally served 69 days on remand in HMP Norwich on two charges of breaching a CBO: one charge which I was not guilty of and another charge which I was guilty of. I initially pleaded not guilty to both charges at Norwich Magistrates Court and was granted conditional bail. I subsequently breached a condition of bail prohibiting me from entering Norwich (as defined by the inner ring road) except to attend an appointment at the Jobcentre and was remanded into custody by Norwich Crown Court following an arrest for breach of bail. This remand had no end date meaning that I was indefinitely detained pending trial. I subsequently pleaded guilty in order be released as early as possible and avoid being held in a Category B part of HMP Norwich, which is the prison where I was detained.