I do not believe Bamber would have to carry his bike, as Rob says.
Exiting out of his back garden he would cycle along the edge of one field for around 200 metres until getting to TSW entrance.
Thistley Close was not there so he would leave the field sooner.
TSW is a good visibility open area of footpaths, cycle paths and farm tracks. On good, flat terrain he knew.
Pages Lane is suitable for motor vehicles as well as bikes.
He would have to lift the bike over 2 waist high styles. Which would take a few seconds.