Reapplied the updates last night.
using compatible charger (waiting new GENUINE to arrived from ebay)
my local store wanted £65 for charger but refused to sell it to me unless I brought laptop in to be sure it right one.
So bought one on ebay for £29.99.
Machine warm but not hot at moment.
Machine has been running for and half days solid doing a file recovery that the windows machines at work where unable to do (yay for mac)
was plugged in with compat charger the whole time, all ok 🙂
So I'm back to 10.11.6, tempted try sierra as some say it less resource hungry.