Without inferring anything specific, I'll repeat something I've posted before: descent below MSA in IMC whilst not on a published approach procedure has killed a lot of pilots, some highly experienced.
Which is why now, we are taught to use a "cloud-break" by doing an instrument approach at a nearby airport / aerodrome to descend at or below your MSA, and then if (and ONLY if) safe & legal (ie: 500' rule + glide clear), continue VFR low level to your original destination - otherwise either go-around to somewhere else, or commit to land on the approach.
**I am not implying that this was in any way the cause or part cause of the accident mentioned here - just a reply to the previous poster - I'll wait for the AAIB for the verdict**