In those days, it was an annual pilgimage to the Internationale, which usually had a better field than the World Final, and carried a first prize of a brand-new speedway bike
In 1965, there was so much expectation and anticipation to see Charlie Monk and Ivor Brown in the field against the ex-NL stars (Fundin, Nordin, etc, etc) that the crash and the lengthy delay in dealing with the aftermath was such a big anti-climax, in front of a very large and noisy CH contingent who had made their mark on the occasion long before the racing got underway
It would have been very interesting to find out just how Ivor would have competed in this meeting, but we were never to find out
I only met him many years later when he was a member of Loughborough Bowls Club in Leicestershire, where he was a very competitive player, although he had somewhat of a unique style of delivery (and no, he didn't wear a great big white t-shirt, just a normal white shirt and club tie!)