Top man
Well spot of investigation today revealed 'most' of the oil was an accumulation of what had run down the back of the block and found it's way onto the hose.
so nowt to be concerned about, yes my hose sections all look like those , but now with a bit less engine oil
whilst in there investigating, cleaned off rust from bottom of sump, cleaned with hammerite rust remover and gave it a coat of winfields finest gloss black paint, I bought it when doing up the Regal about 30 years ago and still seems OK!!
PS the hose clip to sub-frame doesn't fix to anything and my sub-frame is 'somewhat' rusty, even looking to remove it with engine held from above, give it a darn good clean (maybe shot blast) and re-install, or source a better one?