"(3) An indictment may contain more than one count if all the offences charged -- (a) are founded on the same facts; or (b) form or are a part of a series of offences of the same or a similar character."
"... offences cannot be regarded as of a similar character for the purposes of joinder unless some sufficient nexus exists between them. Such nexus is certainly established if the offences are so connected that evidence of one would be admissible on the trial of the other, but it is clear that the rule is not restricted to such cases."
"It is not desirable, in the view of this court, that rule 3 should be given an unduly restricted meaning, since any risk of injustice can be avoided by the exercise of the judge's discretion to sever the indictment. All that is necessary to satisfy the rule is that the offences should exhibit such similar features as to establish a _prima facie_ case that they can properly and conveniently be tried together."