I could understand Mike coming up with this but not you. Take a step back!
It's a lot easier to grow drugs in the remote areas of Afganistan (heroin) and somewhere like Columbia (coke), but it's a bit different when talking about a working farm in the middle of the Essex countryside. I'm sure it was checked out at the time and being unrelated to the murders, wasn't ever part of the case other than Jeremy's dramatic venture into the field to fake being sick.
When you say the drug is much easier to grow in the remote areas of Afghanistan I assume you mean illegally as opposed to horticulturally?
I guess if UK drug cartels could procure opium in the UK it would be an attractive proposition in terms of reduced risk and higher profits. The problem being unlike largely lawless countries associated with opium production: Afghanistan, S.America and S.E Asia, the UK authorities would soon home in on criminals buying up farm land for opium production.
Other than the fact it appears opium poppies were growing at the farm it appears little else is known so can't really rule anything in or out. The most senior officer present at soc on 7th Aug was led to believe opium poppies were growing at WHF for the pharma industry. He took it upon himself to view them and noted such in his WS. If it was some cock n bull story dreamt up by JB then I would have expected this to come up at trial as it showed him less than straight forward.
Many of the historic cases of child sex abuse were perpetuated on the basis that the perps standing afforded him (all him so far) a cover. They were untouchable and the victims' claims dismissed when some dared speak up.
One only has to listen to BW's fawning about 'Mr Bamber' to see how easy NB could fall under the radar. BW referred to NB as the squire of the manor. Who would suspect the squire, church warden, magistrate, Tory?
It seems to me the possibility is dismissed based on a perception of NB rather than the outcome of an investigation:
Did EP ask to see the licence which JB claims the farm had?
What happened to the poppies JB picked?
What happened to the poppies growing at WHF?
Were the poppies forensically analysed to determine species?