Got round to it! First, regarding those deletions, several of those codes are current with other operators whose correct codes we already have. These are:
BLN - Belton Air
IAA - Inaer Aviones Anfibios SAU
NIN - Niger Airlines
STQ - Starwings Dortmund
So no further action required there.
Regarding the Malta Spotting list, here are my findings from them:
JLN - Eurojet Malta - just added a tiny Malta flag to their standard logo (GOJ)
HES - Harbour Air Seapanes trading as Grandharbourair
PVJ - Privajet - we've got this already, but here's an update
HME - Hermes Aviation - can't find a logo
VCJ - Avcon Jet Malta - just added a tiny Malta flag to their standard logo (AOJ)
More to come...
Rod