Just a thought. If the radio station is run on a shoestring, they ight not be able to afford to increase their bandwidth for the speedway, which is obviously making their sytem drag to a halt. Might be worth then sticking a paypal donation button on their site, and when the speedway is broadcast they could increase their bandwidth so it runs smoothly.
I am sure quite a few of us on here would be more than happy to donate a few quid via paypal so that we can hear it better.