Possible Vintage RAF fire extingisher - ID required

[KLB]

Hi all, I would like to know if anyone was able to confirm the below item?

I suspect it is a full cylinder of a vintage RAF electrically intiated fire extingshier.
Most likely to contain Methyl Bromind gas used for fumigation and or fighting fires onboard planes..

Thanks you!

 

[Just me]

It appears to closely resemble one of the RAF aircraft engine fire extinguishers of the period like the one below used on Beaufort and other aircraft. Unfortunately I have no dimensions for the unit below and do not know if they made multiple sizes.