It's weird when it happens, some months back I was biking home out of London and was stopped by the A13 towards Blackwall tunnel being closed - some sort of accident I think - so I started skirting round looking for a back road that got past the closure. When I thought I was passed I made my way back to said A13 only to find I was still in the closed area, with a high-viz clad copper semi- jogging towards me, 'oh god' I thought 'what have I done?' 'Where are you going?' He said 'trying to get to Blackwall tunnel' I replied. He pushed the barrier to one side 'hop over the pavement then go round the barrier a hundred yards down there, I haven't seen you'.
Top man I thought!