Thanks for the advice JohnD.
I think I will fit a new FCU with a 3amp fuse as suggested.
Apart from that though - am I correct in my wiring assumptions?
Yes I am fitting the switch outside of the house. I am aware that it needs to be a weather-proof switch. It is a plastic mounting with a rubber cover over the switch.
I have fitted five outside LED decking "up" lights looped together with 3 core length of flex.
(I tested that all was working OK by connecting a plug to them and plugging them in).
I now wish to connect these to an outside switch (instead of a plug) and power them by taking a link from an...