BOH has a relatively strong history and profile of freight and mail, that broadly follows uk trends. The airport is more significant in UK freight tables than its pax performance.
http://www.caa.co.uk/docs/80/airport..._2003_2013.pdf
The mail and newspaper flights to the Channel Islands have been a factor for more than 30 years, as well as uk domestic mail begun in 1980, and pure freight flights to the Mid East in particular.
FF