I know this is right off the original subject, but to carry on regarding Accumulaters, they are, since the 1940's something completely different.
An accumulater is to be found in some hydraulic systems and consist of a cylinder with either a bag filled with compessed gas within it or a piston, one side being charged with gas and the other, oil from the system. They can act as a shock absorber or to store energy within the system.
Maybe in Southampton it is called something else?
The English language is wonderful for using the same word to mean different things
Richard