TCX had 2 of their own 757s at NCL last year, so in that regard nothing has changed. The Mint and AEU 757s are replaced with A320s, which I assume to be their own. I seem to recall reading somewhere that LBA is getting a MON 757 releasing the A320 that was there to NCL. Assuming that my reading between the lines is correct then that just means there is 1 A320 to find (It'll come from LGW or MAN unless they are not returning to one of their Summer only A320 bases, or subbing out another single aircraft base - releasing their aircraft).