From my email received today, it states the earliest would be Sept-Oct for training.
With regards to the aircraft it was mentioned as they are still on order.
I dont have a clue what all this security clearance is about as I thought last month they were still processing it, however medical clearance is subject to TB and Heart and Lung checks which I understand.
I did get given a HR dept contact to leave contact details with when going abroad, it might be best to contact the person who gave you the happy to inform you emails.