You are vastly overstating what actually transpired the other day, and the information you are giving out is misleading.
No law changes happened, just a new set of sentencing guidelines announced. These are guidelines that judges use to decide how to punish people. Overall, not much is different to the standard punishment patterns that small growers generally got anyway (fine and/or community service), although the inclusion of several bands of severity (based on plant numbers, assuming 40 grams per plant) give people some wiggle room, if they want to lower their chances of potential punishment. The main positive is that the lowest band of punishment no longer includes prison as an option, but there are some things to take into account that could push you up into the next band, even with 9 plants or less. Also, remember that these are just guidelines, judges can go outside of them if they see fit.
There were a few new things added, like medicinal use being allowed as mitigation (note, mitigation does not equal defense, it just means that your punishment will be adjusted to be slightly less severe), and some stuff that isn't quite as promising, like potency being an aggrivating factor (ie:worse punishment).
I can't be arsed explaining all the ins and outs, but the document is here, for anyone interested:
http://sentencingcouncil.judiciary.gov.uk/docs/MCSG_(web)_-_January_2012.pdf
Page 225 for the start of the drugs stuff, page 239 for cultivation specifically.
Note that all this stuff still applies to SENTENCING. In other words, AFTER the police have broken down your door at 5 AM, trashed your house, and arrested you. There is absolutely no reason to assume that the police and cps will not bother, as you stated in your post, and Reynolds is playing a dangerous game with people's freedoms by deliberately spreading this kind of rumour.
I won't get started on the Reynolds thing here, but suffice to say I don't think he's doing anyone any favours with his approach and conduct.