Is system designed to feed both showers at the same time?

Have a boilermate 2 and two showers in the house, all of which were installed when the house was new some 11years ago. Is the system designed to satisfy both showers at the same time? I see that there are two pumps attached to the heat store.Thanks

One pump is Boiler
One for heating.
Mains cold goes in the unit around a coil which heats the water from the thermal store.
Comes out again and is mixed by a blending valve. Then to the hot taps etc.
Being 11 years old, you may need a de scale and or new blending valve. As no doubt you are NOT getting the max out of the unit now.
BUT if you run 2 showers there will; be a difference.
Just the same as filling to buckets at once.
The same principle applies as a electric shower or a combi boiler.
Also the slower the flow the hotter the water.
Because if the water passes through the coil to quick it would not be so hot.
Mike MGC/H2O