Be aware of the differences in fuse ratings, Francis. I believe that the early Lucas fuses are rated at the current (ie. 15A) at which they would blow immediately. North American and I think most modern fuses are rated at the maximum current that they will support indefinitely without blowing. Two very different situations, with a Lucas fuse blowing at approximately 1/2 the current of the NA standard. For a period Lucas fuses carried a dual rating, reflecting both circumstances. I found this out to my cost due to a previous owner replacing the original Lucas fuses with similarly rated NA replacements. A subsequent short circuit resulted in the car attempting to immolate itself.
