I wonder it they ever did a reconstruction.
Using the same bike and at the same time of night, to see how easily it was to do and how long it took to get from WHF to 9 Head Street .
I don't know whether they did a reconstruction or not.
I do know that police forensics went over the bike, testing for any mud or residues which would have shown that it was used to cycle to WHF or Tolleshunt D'Arcy across the muddy fields in the area at that time - that part of the Summer was wet.
That would have included checks for mud and residues from the coastal path, part of which would have been muddy.
Forensics found that there was no mud or residues on the bike, so it had not been used to cycle to WHF by the murderer.