Hi
The guide Dawn has given you the link for, goes through each of London's civic cemeteries giving dates and links. Each cemetery is placed under whichever modern London borough it is currently located in. The coverage of these modern London boroughs is also explained - which old district now comes under which modern borough. Shoreditch is currently in the borough of Hackney which only has one cemetery within its borders and which has indexes online (Abney Park - all links in the guide). There are links in the guide which will help you find adjacent boroughs to Hackney. Knowing the address she died at would help because you can track the nearest cemeteries from there - Tower Hamlets for instance.
She died in the civil registration district of Shoreditch which in 1893 covered all these areas
http://www.ukbmd.org.uk/genuki/reg/districts/shoreditch.htmlSo though Shoreditch is now in the London borough of Hackney, Bethnal Green for instance is in the London borough of Tower Hamlets. You can track in the guide the other areas but knowing her precise address would be much better.
Was she the first to die in her family or did her husband die before her? If so where were they living at the time? Would she be buried with him? Was it the sort of family that would have been able to afford private graves? If she was more likely to have been buried by the poor law union than cemeteries vied for these sort of institutions business and undercut each other for the trade. Workhouses across London may have buried as far away as Brookwood cemetery in Surrey, which was also the choice of many Londoners with its regular train service to the cemetery. All this sort of information is in the guide which begins with churchyard burials and progresses through to civic cemteries.
Regards
Valda