Quite right. The NL is a professional speedway league, just like the PL. I went to the Dudley matches held at Perry Barr and really enjoyed them. As Vince says, the times were only a second off the Birmingham times (and this was a team which included Jason Lyons and several other top PL riders!) and the racing was just as good.
Any Potties who refuse to watch NL racing are simply cutting off their own noses to spite their faces.