Roydon.
Infamously, both platforms are BEFORE the level crossing on their respective sides, increasing the barrier-down time.
The village is on the London-bound side and the car park is on the Cambridge-bound side.
The ticketing used to be on the London side, so that meant if you were driving to the station (e.g. from its furthest extremities or with heavy luggage) you had to drive across the level crossing, park, walk back across the level crossing, buy your ticket, and then, if going towards Cambridge, walk back across AGAIN to the other side. All with the barriers going up and down frequently. Was always safest to leave 20 mins for London or 30 for Cambridge.
I believe nowadays, since the ticket office was shut, there are TVMs both sides... however I remember reading something that at first there was only one on the Cambridge side, forcing even London-bound foot-commuters to cross the level crossing twice in the morning rush-hour!
I'm not sure if that ever got resolved, as <rant>I've not used the station ever since they skip-stopped the hourly xx:13 express on me despite (a) having already cancelled the preceding and following xx:30s stoppers and (b) the NRE website indicating it was running on time (unlike the xx:30s which it knew about), thus ruining a planned day-trip out with a wheelchair-bound friend.</rant>
Back in the 70s, when it was Elsenham-style swing gates, there were separate wicket gates which a friendly signalman might unlock for you. Once he even cleared it with a stationary Cambridge-bound driver for me to nip across and catch it!... actually that might have been in the 80s with the first set of barriers (single full-width both sides) which still had the separate gates, albeit then in metal. Gone now though, with the double half-width both sides. (Apologies: I know there are correct sets of initials for the various types, but the subtle distinctions have tended to elude me and I don't want to end up using the wrong ones.)