As far as i read it:
They made a new application which involved moving the stadium on to the site of the existing car park. This was abandoned and they then made an application to vary the existing permission by shortening the track and erecting new buildings etc.
Not exactly crime of the century though. Not sure given everything that's wrong with speedway why this is even an offence. Give a set of helmet covers to the start Marshall in case a late change is needed. Concentrate on 4 blokes racing not some stupid technicality
Probably take at least a year to get planning. I can't see the speedway being the sole tenant. The cost of running the stadium would need to be born by whoever was running it. Add those to the speedway rent and that's a guaranteed loss maker. You'd need a stock car operator definetly on board