Anyone any ideas what this font is called I see it a lot on the back of football shirts.

Probably custom and not available publicly. If you tell us the team or the source of the image, we might be able to say more. 

Hi Gecko, this is a variation of the font we designed in 2013 for Futbol Club Barcelona and Nike for the football team jerseys. Here you can see the original design: http://portfolio.vasava.es/nike-fc-barcelona-custom-typeface-2013

It is not available commercially as it was an exclusive design, although you can find a lot of counterfeit versions across the web.

 

 

Hey thanks Bruno - good information.