Since petitions seem to be the vogue I thought of giving this a go.
We the undersigned are extremely grateful for the bus provision, but we would like the return buses to Cambridge (terminating at the Catholic Church) to depart at interspersed times through the evening. This would greatly support the flexible completion of experiments in the evening (a common gripe among the student/post-doc community and others of the Sanger):
Route 1: 17:30
Route 2: 17:30
Route 3: 17:30
Route 9: 18:30
Route 1: 19:30
Route 6: 20:30