Personally I'd call them anyway. Cutout is life expired, phenolic materials possibly, these are on lists for replacement anyway but I little nudge can't hurt them. Wouldn't be surprised if the head and/or fuseboard had traces of amosite (brown asbestos), which is normally fine unless disturbed, you may want an abestos survey (think they're not too expensive (ÂŁ20~ for sample testing I'm lead to believe), or just send in
@telectrix , he smokes the stuff and like a loveable cuddly cockroach, seems indestructible.