The UK has had 17 sets of centenarian twins (including Celina Bush and Victorine Donvel, who are Belgian but Celina lives in the UK).
The latest set of twins are Florence Davies & Glenys Thomas (report on their 99th birthday: http://www.campaignseries.co.uk/news/86880...99th_birthday/)
, who Melissa has confirmed are still alive.
Here are the years of birth of the UK's twins:
We've gone from having 3 sets of twins from the 1870s-90s, to 10 in the 1900s, and to 4 so far in the 1910s (and we're only 20% of the way through). Seems to me that they're increasing at a very rapid rate.