Hi Cissy, Electoral Registers are kept at the local central library for the area & there may also be copies at any local archives. So you need to find & visit the central library that covers Stalybridge. The registers for around this time are normally in districts for the area & then the road names are in alphabetical order. I cannot remember exact dates but registers used to be released twice a year before becoming just once a year.
There should be a master index for you to look up the district for Sand Street & then you have to look through that district's register to find the address. Then it will list all the men over 21 years of age, who registered to vote, but remember not every man did. What about the women I can hear you say, well they didn't get the vote till 1918 & even then they had to be over 30, see link about the Suffragettes: http://www.historylearningsite.co.uk/1918_representation_of_the_peopl.htm
That said, I have seen a couple of women in early electoral registers, but both were widowed & alone, so maybe the registrar slipped up or made an exception. The final point about these registers is that they were about 6 to 8 months behind time. This means that if anyone registered to vote & then moved house or died, their name would still appear in the electoral register for the following year, in that area. This can be quite disconcerting the first time when you find a relative's name a year after you know they died. I'm fairly sure there will be a 1914 register, but remember all registers will have been printed from information collected some 6-8 months earlier.
As Lavinia died in Aston now part of Birmingham, was she just visiting Aston & was 45 Sand Street given as her home address on the death cert? If so, then you may well find one of her sons or another relative at Sand Street, don't just look at 1913 /14, go earlier to see how long they had lived there. Unless you already know the answer, I would also try & find out why Lavinia was in Aston e.g. was she visiting relatives, where did she die & so on.
Let us know how you get on with the electoral registers, they can be very confusing but also rewarding as to who else is living in the house, lodgers, boarders, nearby, etc. I have found names that fit in with family stories & also a married chap & his wife living two doors away from his mistress, my cousin's mom! Hope you can follow above. Regards, TonyR.