grumppa
SPAD also stands for Signal Passed At Danger on the railways, and therein lies the danger of so many abbreviations. I use the GN abbreviations only when their meaning is clear, e.g. DW (DH is also clear, but not one I would be expected to use).
This made my laugh grumpa. I wonder how many SPADs a SPAD passed while drive testing his eyes around Barnard Castle backalong, I'll get my coat ... 



sometimes abbreviate poster's long names to initials. Maybe I'd just better apologise now! Sorry (but I'm still going to do it!)
Give me DH any time - and if he's in the doghouse, the D doesn't have to stand for dear!