I am a US actuary working on a variety of mortality tables for the Society of Actuaries. I have more detailed links to the English Life Tables if you are interested. For example, the link you have for ELT No. 1 is to an article that contains only a snippet of the table. There is a complete table located on HISTPOP - "Fifth Annual Report of the Registrar General of Births, Deaths and Marriages in England”, H. Claves and Sons for Her Majesty’s Stationer’s Office (London, 1843). Root address is http://histpop.org/ohpr/servlet/Show?page=Home
All the ELT's are in the SOA database along with citations. Here is a link to SOA's database http://mort.soa.org/