".... there is a clear public interest to be observed in holding officials of the State to promises made by them with full understanding of what is entailed by the bargain."
"The statement of the prosecution that they would offer no evidence at the next hearing was not merely a statement made to the defendant or to his legal representative. It was made coram judice, in the presence of the judge. It seems to us that whether or not there was prejudice it would bring the administration of justice into disrepute if the Crown Prosecution Service were able to treat the court as if it were at its beck and call, free to tell it one day that it was not going to prosecute and another day that it was."