Thank you, with some small modifications ("dpkg -i --force-overwrite libpcre3_6.7-1osso1+r1_armel.deb", rather than "dpkg -i --force-overwrite pcre3/libpcre3_6.7-1osso1+r1_armel.deb") this seems to have done the job!

I am also amazed how quickly your help arrived - so thanks tremendously.