Cremated against their wish to be buried.
I doubt that cremation would have been their choice -the person who may have known might have been Pam, June's sister but maybe her advice wasn't sought?- and I seem to recall it happened with indecent haste. Of course, as Sheila was divorced, JB had every right to do what he wanted re her 'disposal', but it might have been more generous to allow Colin to voice his opinion.