Ok so Julie either visited Bamber for a couple of days when he was working.
Or Julie visited Bamber for a week or more Some of those days he would be working.
Either way Julie would be cycling around Goldhanger on her own.
The CT only gave one reason why the bike was there - so Julie could cycle 3 miles to get a bus.
You know bamber worked many hours.
Don't believe Julie's statements reference the times she came to bourtree cottage.
Strongly believe any free time she had. And students have many. She would spend her time with bamber. This more than likely took place in goldhanger than south east London due to Bambers job. Although bamber did visit in the week.
Believe there is a source that bamber himself owned a bicycle himself with is not unusual. I own one myself. Very rarely use it.