While I have been out and about cycling on my own I've had a mixed experience on the trains. Some of the time they've been pretty empty and other times I they have exceeded a safe seated capacity and I was forced to stand. From Kings Cross to Stevenage seems to still be pretty quiet but from St Pancras to north Kent towards Whitstable and Margate on a Saturday morning has been very crowded. Coming back the same day in the afternoon less so. On Sunday 30 August, the 09:10 fast train from Kings Cross to Cambridge was two-thirds full for seating capacity. Coming back the same day from 3pm it was less busy.