Unreliable service. National Express from LHR to Oxford was the cheapest service, there’s a reason for that. Arriving 35 minutes late with the driver explaining he was having his break! When inquiring whether this always happens we were told yes, I asked why this wasn’t factored into the timetable and he shrugged. The 4:25pm bus we booked a spot on was never going to arrive at 4:25pm, according to the driver. Would not recommend as it seems there is no certainty as to when they arrive. I will add I’m obviously not against anyone taking a break, but not factoring break times into a timetable is ridiculous.