Thanks Graham. I'm going for orginality so keeping the fuse box. From memories of a 1972 4/4 that I owned, my Plus Eights have relays (apart from the indicator/hazards) that I don't believe were fitted to 1970s 4/4s. It could actually do with three relays; an additional one for the headlights.
Anyway, if anyone has a loom, I'd be really interested.
Thanks and regards, David.