There is usually no need to open the LED driver..
I'm quite positive it has the following easy to identify wires (well easy if you haven't unhooked everything yet
)
AC input power (2 wires usually) many have a 3rd green ground (I see England but you still have 3 prong plugs composed of hot/neutral/ground)
DC output power( 2 wires that go to the LED board - probably red and black in color)
PWM input (1 or 2 wires that you apply a PWM signal too to dim)
So now its just a matter of figuring out if the driver needs a 5V PWM or 10V or something else..
You should be able to measure the output of the "board you wish to do away with" and see what the PWM peak voltage needs to be