What lounge for Air Malta Heathrow T4

[King of Sutton]

I’ve got to travel to Valletta next month and I’m booked on Air Malta in J. I’m struggling to find what lounge they use at T4. I’ve tried their website and can’t find anything, I’ve tried a Twitter message but no reply and a google search seems to say the Etihad lounge but that doesn’t seem right. Does anyone know the answer or has used Malta J from LHR recently?

[ringingup]

According to a post from June on Flyertalk, Air Malta is using the Plaza Premium Lounge for Business Class passengers.