Pistols, transport plugs and other bits

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Hello,

Just a fraction of what I found metal detecting over the weekend as you can see:

Pistols
Transit caps
Coins (one made into an aircraft)
Lead seals
Incendiary parts
Arming fork
Data plate parts (complete one I bought for comparison)
Practice bomb parts

Any comments welcome, im particularly interested in finding out more about:

Large pointy transit plug (which bomb would it be off)
The plug marked no20 IZ
The item with coin for scale.... is it a divider for bombs/munitions?
The smaller plugs are the same dimensions as incendiary head so are they to do with that?

All found on a former RAF base.

Thanks in advance.