Race frequency is 186.xxxxxMhz FM, this seems to be a Rally issue.
I'm not really a rally bod but I understand that they have radio cars dotted about in order to provide a comprehensive radio network for events.
The Rally frequencies are different but what they are Idon't know, it would seem from reading the article that they are around 86Mhz AM and FM.
So, if you're a Rally type this will affect you, if you're race then I don't think it will.
So, no need to retune the scanners then! (obviously only spectators as Marshals would never have scanners on post now would they!)