Leaking current

Still trying to find a small current draw on the battery. Worked my way through pulling the fuses and it reduces when I pull the fuse which delivers a constant live for clock radio, inside light etc. But there is obviously a draw which is "outside" the fuse box. So question is what would that be (what circuits don't go through the fuse box?). Glow plugs is only one I am aware of. Any other suggestions as to what it could be please?? (1991 Defender so no ECU etc)

Alternator is wired direct to the battery so the reg/diode pack could be at fault

How much current are we talking about?

OK, not as bad as I thought. If I disconnect the clock and radio I get a draw of 0.03 amp on the 1st fuse. This is the 20amp fuse that feeds Horn, Int (whatever that is) and fog light.

So I guess that's not enough to drain battery (96 ah). But still interested as to why I should get the draw?