That's interesting, BOBBATH as the story I have heard is that Aub Lawson went to the other two (Williams and Waterman) and asked them if Biggs had "said anything to them", meaning had he asked them to stay out of his way as he only needed one point. When they said that he hadn't they decided to "deal" with him for being too arrogant to ask for help. I have never heard that story about Split Waterman before.
Of course the fact of the matter was that Biggs had made four lightning starts in his first four races and did not feel the need to ask anyone for help, especially as Lawson and Williams were not having the best of nights. If he'd got the same sort of start that he'd been experiencing all evening it wouldn't have mattered what the others did as Biggs would have been away. Unfortunately, for him, this time he was drawn on the outside and gated slower than Lawson (in no. 3) who took him out wide. Whether the story about the others "fixing" him or not is true, I think nerves had more to do with his defeat that night that anything else.
P.S. Even if Lawson and Williams tried to help Waterman by staying out of his way, Biggs only needed one point to win the title, so it wouldn't have mattered if Waterman had won if Biggs had come 2nd or 3rd.