[jambutty]

The other comment is that various police forces up and down the country would not allow certain teansto play within a certain radius ofcertain rival teams.

So the police would not allow Man U to play at Old Trafford because a rival team Man C play in the same city? The only time that the police step in is when both teams from a city have a scheduled match at home on the same day. They either re-schedule one match to start early and one late or make one match be played the next day.

try puting them in grounds were rival fans can't ge at one another

It happens every week at every ground. Rival fans could get at one another except for the fact that they are segregated. And so would the two lots of fans playing at a neutral venue, as they do at the semis and final.

Burnley draw Blackpool with Preston getting Acc Stanley,all in the same round,you have to allow for things like that happening.

If Burnley were due to play Blackpool the match could be played at Preston. If Preston drew Accrington that match could be played at Bolton. And if it so happened that Bolton drew Man U that match could be played at Birmingham and so on.