I think you are getting mixed up between the International team and league teams when you say most of the players are foreign Caroline.
Yes you can be foreign as long as you have an english parent or grandparent, but certainly most of the English squad are English
The Replublic of Ireland team used that ruling to great effect.
Just out of interest, have they moved County Durham to the other side of the country. I say that because i was at Lake Ullswater at the weekend and I think 99% of the people there were from Durham