Certainly an interesting aircraft spotted at Mackay Airport after the sun went down on Monday 30 April was Corporate Air / Vee H Aviation Metro 23 VH-VEU.
It appears that VH-VEU is possibly on a closed charter flight and possibly arrived into Mackay Airport from Brisbane on Sunday 29 April.
Sadly, its exact movements are not 100% confirmed.
UPDATE! On Wednesday 2 May, VH-VEU was spotted on the ground at Gladstone Airport. Information suggests that it arrived from Mackay Airport on Tuesday 1 May and stayed for the night.
It appears that indeed VH-VEU is on a closed charter flight.
VH-VEU looked to depart Gladstone Airport and returned to Brisbane later on Wednesday 2 May.
Photos taken by 'JM' and Col B ©