Who said the police aren't going to follow this up if directed to? IMO the officer was a candid as possible & told us that our statements weren't going to be viewed as 'independent' but 'biased', that doesn't mean that there's no follow up but more the statements will be viewed with a pinch of salt due. We were certainly not a group of independent cyclists, we were a group riding together & that will bias out POV. The same is true if you're travelling in or "an informal group traveling to & from the same location using a single navigator through cooperation" (aka a convoy, but there are legal technicalities in calling it that), your statement isn't viewed as being completely impartial & independent.