I know it's a joke, but 1) it was Kennett's 3rd ride he got injured in, not 3rd lap. 2) Plymouth didn't break any rules. 3) the rules haven't been changed since then, so BSPL must think they're still suitable. 4) Have any injured heat leaders been replaced since then?
While it's easy to mock Plymouth, no-one else has been in the same situation & done any differently (unless I've forgotten someone).
Most recent examples are Jason Doyle at Ipswich last year (different league I know) & Erik Riss at Redcar this year, neither of those teams could find a heat leader replacement.
Most recent heat leader signings have been "spare" riders coming back from injury (Nicholls) or a ban (Morris). Riders of this ability are not normally available to cover after the season starts.
Better mention Poole now, I think Kennett would be a good signing for the Pirates if his average dropped to 4.00, for example.