The cycle policy is described by Great Northern here:
Folding cycles can be carried on any service.
For services stopping at Meldreth, Shepreth and Foxton non-folding cycles are not allowed on the following service: the 08.06 from Royston which stops at which stops at Meldreth at 8:10, Shepreth at 8:13 and Foxton at 8:16. and arrives at Cambridge at 08.29.
Non-folding cycles are not allowed:
- on trains south of Stevenage or Hertford North timed to arrive in London between 07:00 and 09:30 Monday to Friday, except on public holidays
- on trains timed to leave London between 16:00 and 19:00 Monday to Friday, except on public holidays
- on trains that are timed to leave Ely or Waterbeach or Cambridge North towards Cambridge between 07:45 and 08:45 Monday to Friday, except on public holidays.