Scene of crime officers have been to this Royal Mail site and have identified where the body was found! Did the visitor use the walkway? Did the barrier commit the crime? It almost sounds like a quote from the Cluedo game.
The postman, murdered in the car park, by the traffic barrier!! (Beats the lead piping and Professor plum any day) Newgate will have to “stamp” their authority on this one and mend the “post” or barrier "first class".