If you are interested in trying to trace your descendants, perhaps these web sites might be of interest:
If your ancestors lived across the water (The Humber), this resource might list a relative. You can then order the relevant copy of the birth/death/marriage certificate.
A wonderful resource that acts as signpost to many other web sites.
The Commonwealth War Graves Commission web site —if you had a relative who died whilst on active service, this web site will be of immense help.
The 1891 census on the web.
British Army World War 1 information
UK Census online
Help using the National Archives