Loftus paco grahn tomson would be a good start 

What I expect is a post AGM press release, stating... "It was the most harmonious AGM ever"... "The plans for next year, and beyond, are the most exciting ever put together, and were delivered with total collaboration by everyone in attendance".. "All the promoters have come away from the AGM in agreement as to how the sport should move forward, and all share the same vision for it"... "There are challenges, but with the plans put together, we will be able to meet those challenges head on and build a very bright future for Speedway in the UK"... "We have put together a fantastic plan for youth development to build on the magnificent work done over the past few years in particular"... "We are sure the loyal fans of the sport will be delighted with the decisions made, and continue to attend next season in their thousands".... "And hopefully bring a friend" (Sorry, made that one up)... "It was the most harmonious AGM ever.... "(S**t, we've had that one)"

Any suitable promoters genuinely waiting in the wings to take the opportunity forward with up front investment in the basic infrastructure?

Think now having Oxford in one league then the 2h 2a makes a lot of sense and you would be having fixtures every week,as you would still have to fit in koc and BSN matches plus play offs. 

You could have Bowes,Hellstrom Bangs and Bailey I’m pretty sure think we would be nearly a point under the limit but that would be one hell of an exciting team alongside Rushen and cairns.

Maybe they are going to save the premiership. If they do, then  good luck to them. Championship then needs 2 home and 2 away, can't be having less meetings than this season.