I always forget things while I'm typing. Sport is made in Mexico. Here's a post from last year quoting Eley. John
This year ELEY has re launched its product range, which features a rationalized product choice.
In the new product range the low end product has been branded Target which will feature a yellow label in the US market only, Worldwide this product will be branded as Sport in a green label.
Target is manufactured in England with the high quality production systems ELEY is renowned for.
The ELEY Sport product you mentioned is still available, this is the green/purple label and is made in Mexico. This is a cheaper lower quality product than the yellow Target cartridge.
I hope this email answers you questions, thank you for contacting ELEY.