Cheers fellow carpers the information you have given me, I am so glad for your advice as I was actually thinking of between 18 & 24 inches, similar to that of the term 'laying on'. My only excuse for thinking in that direction can only be down to many many years of couse match fishing and clearly not enough time Carping.
Once again because of my transition to catching proper fish is a recent one I am very gratefill for any & all your advice & tips.
Cheers & TIGHT LINES
kEITH.