Having had my curiosity piqued by all this discussion of residency requirements, without going into detail I had a quick look online.
Whilst the website states the need for a 3 year residency, the official line is that for higher clearances you will need to have been resident for at least 5 years and for some clearances 10 years. Furthermore, the security considerations of some of the more sensitive posts, for example FJ QWI or tactics posts, might well require an individual to be a UK National rather than just a British Citizen.
Whilst it is possible to come in under those limits, as the concepts of loyalty and trustworthyness are not necessarily linked to nationality - as politicians demonstrate on a regular basis - it is difficult to do so, especially if an individual is not from one of the '5 Eyes Nations' and this will likely add further time and hoops to be jumped through. Furthermore, if the selection boards think there may well be security clearance issues further down the line that might restrict an individual to being able to carry out only limited, basic duties, they might see it as a limiting factor in terms of employability and career progression and as such would likely look elsewhere for individuals that could be employed in the full range of rolls.
Last edited by Melchett01; 2nd Apr 2012 at 14:40.