A British mother has spoken of her joy after giving birth to a much-longed for "twin" to her five-year-old son.

Reuben and Floren Blake were conceived from the same batch of embryos but were born five years apart after some embryos were frozen during fertility treatment.

Parents Simon, 45, and Jody, 38, had been trying to start a family without success and began treatment in 2005.

Five embryos were created and two implanted in Jody Blake, which resulted in the birth of Reuben on December 9, 2006.

The remaining three embryos were frozen until the couple decided to try for another child last year.