I'm looking for a good course provider who can offer training in practical air quality monitoring. Preferably with an emphasis on CoSHH-related personal exposure monitoring, rather than environmental emission monitoring (though the latter would be useful too).

Ideally, the training would have some form of accreditation that would enable me to undertake such work with real professional credibility.

I've had a look at the BOHS website and they seem to have some interesting courses, but I would appreciate any recommendations from IOSH members. Thanks!