Think mirror.

Up is down and left is right.

ipod flipped >PoBI

https://isogg.org/wiki/People_of_the_British_Isles

So far the project has taken around 4,500 blood samples from people in the UK. The people sampled, from the whole of the United Kingdom, must have four grandparents who lived in the same rural area as themselves. Although based at the University of Oxford, samples have been collected by a number of other British universities, and data shared. An approximately equal number of male and female were collected, with a median age at collection of 65 years.