Write your BFPO number in the 'address' field and leave the town/city, county, UK postcode and country fields blank. Do not write 'not applicable' or 'N/A' or any other information in these boxes.
If you are supplying the BFPO number as your current address, we still require the month and full year at which you began using this address in b37.
If you are supplying the BFPO number as part of your 'other addresses' history in section.
You can find more information about this in the DBS unusual addresses guide..