BOAC That wasn't mine then
Took off from Stapleford for Luton. Set course 100° out and was thinking that the Lea must be in flood, or that i might be a bit south of track. Turned "North" to correct and thought the big bridge looked familiar. Realisation set in and called on 121.5. Got a right rollicking but as a mitigating circumstance, the cabin heater was leaking CO2 into the cockpit. A checkup in hospital and then a couple of days later a one sided discussion followed.
Kept pretty quiet about it to this day.