LG WD12021 washing machine 'de' door lock error - FIXED

How to fix the dreaded 'de' door lock error on a LG WD12021D6 front loading washing machine. Do not buy a replacement door latch until you watch this. This uses the built in (hidden) adjustment grub screw fitted to the back of the door latch mechanism. You'll need (in order),
1) Finger - to turn off power point ;-)
2) Pliers - to remove door seal spring
3) Philips head jewelers screw driver - to remove door latch
4) Wire cutters or file - to get access to adjustment grub screw on latch
5) Flat blade jewelers screw driver - to 'slowly' adjust grub screw on latch
6) Patience (should take 20 - 30 minutes, + 10 mins to watch video!)