Driving it would take about an hour, I was referring to getting to the ground, rather than the train journey. Ingatestone is indeed a good place for a post match pint, i recommend the Bell, in the High street about 5 mins from the station. I live about 15 mins away.
Take the M25 across the Dartford Bridge then take first junction A2 to get to the 02 - its roughly 15 mins up the A2 and outside there is plenty of car parks, including the tube station car park. As said previously, i was out and onto the A2 in 15-20 mins after the concert. A2 to M1 using the...
I parked at the O2 for Metallica two Saturdays ago, when the tube was shut, got me £15 but only a few minutes walk to the arena, and took me about 15 minutes to get out as they funnel the cars away really well, was back home by 12.45am and the gig finished at 11.15pm, so I would recommend parking