the switch above the second end trim saw will not preclude the machine from starting up. it is a safety interlock that shuts the machine down if the rear saw has not traveled to its up position before the panel reaches it. until it gets a signal from the machine that the plc is running then the saw will be in its home position, i.e., down.
the only two fuses that will cause the plc being without lights are the F1 and F2 fuses. do not attempt to test these in the machine because you can get back-feed and that will make the fuse appear good.
another thing i would check is to see if you are actually getting 24 vdc from the transformer. you can test this directly at the transformer G1(the side with the blue wires). if not then check to see that you are getting AC voltage into the input side of the transformer (the side with the 3 black wires. check L1 to L2, L1 to L3 and L2 to L3.) there should be at least 208 vac at these points. if there is no voltage here than in all likelihood there is no power coming from the GRM Q4 overload. push the "I" button on the front of it to reset it.
by the way, have you checked to see if the voltage that the machine is rated for is the same as the voltage at your shop? look at the paper placard inside the electrical panel door for this info for that particular machine. do this first before any of the above. i do not know what voltage you use in merry ol' England but the input has to match the machine requirements. woe be you if you attached 380/400/480 volts three phase to a 230 volt three phase machine!