May 2012 update: Further failures of this type of valve have been reported since the original guidance note was issued in May 2011 and it is clear that some of these failures are not due to corrosion.
HFC phase-downs, usage bans in certain products, a stop to the use of R404A and an end to the sale of pre-charged air conditioning and refrigeration equipment are just some of the proposed revisions to the new European F-gas regulations revealed in a leaked document this week.
The Health and Safety Executive provide some useful guidelines and resources, including a report prepared by Cardiff University on the scale and impact of illegal drug use by workers.