Top one is indeed the neutral switch and will just unscrew and eventually pull out, but its fiddly. Have replaced a few of those in my time and they are a PITA to get spanners on. There maybe some shims under the switch body which you'll need to be careful not to lose.
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Roast Beef Monster!
Termignoni and Bucci - Italian for pipe and slippers!
S4 Fogarty, S4R 07T, 748, Series 1 Mirage
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