G'Day,
Thankyou to those who answered my query, and my apologies for a rather belated reply. It was a sort of general question and I wasn't sure how much detail to include. I do have the Death Certificate and the informant was the Coroner for the city of London. She was a widow and her children were very young so it is very unlikely that her body was transported home to Chelmsford. I have also searched the Burials for Springfield and Chelmsford with no luck.I wrote to Highgate and a very prompt reply told me they had no record of such a burial. I'll try some more of the nearby cemeteries and look for some records for Holloway Prison itself.
Once again many thanks for the helpful replies.
Regards, oldfeller