Mr Heron's lunch break that day was between 1 - 2pm.
The police have stated that Ann was killed between 4 - 5pm, so definitely not during the lunch hour.
Mr Heron's drive home after the meeting at Cleveland Bridge has always come under suspicion, as there have been many different times given over the years of the time he left the meeting until the time he arrived at his office. In the 2022 documentary he apparently left the meeting around 4.20 and arrived back at the office around 5.00. This would seem to support his version of the drive through the village of Croft to Middleton St George.
Looking at Google Maps, from where Cleveland Bridge was to Croft is around a 10 minute drive, and then from Croft to Middleton St George (including driving past the Golf Club) is around 13 minutes, so, if we add a couple of minutes to that, gives a total of a 25 minute drive back to the office. If he did leave the meeting at 4.20, then he should have arrived back at the office at 4.45 - not around 5.00. So, potentially, there could be a missing 10-15 minutes from that drive.
Could he have had time to drive from the meeting to Aeolian House (literally a 2 minute drive), commit the crime, then back in his car, head towards Cleveland Bridge and then journey throught Croft back to his office?
The answer to this is what time did the first witness see him on his drive back to Middleton St George and where did they see him?