A barrister must not
return under rule 105 a brief to defend a charge of a serious criminal
offence unless:
(a) the
barrister believes on reasonable grounds that:
(i)
the circumstances are exceptional and compelling, and
(ii)
there is enough time for another legal practitioner to
take over the case properly before the hearing, or
(b) the
client has consented after the barrister has clearly informed the client of
the circumstances in which the barrister wishes to return the brief and of the
terms of this rule.