Right - update. Sorry for not posting earlier, but as you know, BlackBerry went tits up...
It appears that the agency have kept 6 of the original 24 on - but how much longer still hasn't been confirmed; it may only be to the end of the month. The selection criteria of who stays has not been detailed - worse, there is a suggestion it was simply names out of a hat.
The Duty Manager, Supervisors and Flight Allocators are simply aghast that I'm not being kept on - in the words of Dean (Allocator) "TMR, if I had 10 of you, we could do away with 20 of some of the full-time ones we have". It's very nice to hear that and I know that the decision on who stays is not down to them - even the Duty Managers don't get a say, it all comes "from upstairs".
A few weeks ago, after staying on late, one of the Duty Manager's drove me back to my car an en route hinted that they wanted make me permanent, but avoid doing so through the agency (as they would doubtless charge a percentage for the introduction) and that "they have my phone number" so it may be that they will contact me at a later date, once the agency involvement is fully over.
There are 11 blokes on my shift and each one has said that they cannot understand why I haven't been kept on - "TMR, you are the hardest working one of all of us and highest trained, it makes no sense". Again, very nice to hear.
I'll go to the Agency on Wednesday and see about this other position - hopefully it will tide me over for the time being and with any luck I'll be back chucking bags about before too long.