as an ex employee of the MOD,
there are security checks to be made.
if they are employing you direct, you and your direct member of your family and the same applies to all members of staff have to go through CRB & terrioist check, this normally takes 3-4 weeks.
but until they have all the nessecary info they need you will not be allowed in.
remember to tell your staff to wear id cards at all times and heed restricted areas.
no smoking in grounds or hanging around, and Don't walk on the grass!!!! they don't like it.
you can be stopped and searched at any time, this applies to your vehicle also, which will have a pass, which must be displayed.
good luck with your venture.
lynn