Finding passport number...without passport

[platypus]

I need to apply for a visa for a work trip, but my passport is not in my possession, can I phone the passport office for my number, or is it the kind of thing they would refuse to give out over the phone?

 

[platypus]

Aye I figured that was the case :s.

 

[platypus]

They have my driving licence but not my passport .