76Fan: Thanks for this info! Does this mean you served with Mann's for a time? If so, we'd love to hear more.
Heli1: You are going to have to post an image of Helix!
Helihub wrote: .. given the red/white Sunstrand sticker on the side ..
And the rest .. I don't know why Vanguard didn't go the whole hog and sell every square inch of the fuselage for advertising .. as they were well on the way!
Of course if they had .. then this is how VANG may have looked ...
"The Vangvertiser" .. or how Vanguard's 206 may have looked had they embraced a few more logos on their ship! 
For those who knew my godfather then they will also remember his aversion to advertising or company names on the airframes. I'm not sure if he would actually break-out into a rash when he saw what he considered as graffiti; perhaps something close to it!
There were some at Ferranti who were at odds with him on this and, more than once, a Ferranti ship appeared (usually a Bolkow) with 'Ferranti Helicopters' painted on the side. Such apparitions were however generally short-lived for as soon as the Colonel sighted the indiscretion it was required to be returned to 'normal'.
In the latter years I think the Colonel conceded with the yellow 105's (which were almost constantly involved in utility ops) and BATB (the ex-Rolls Royce corporate mount) was stamped with "Northern Lighthouse Board" for that contract. At least one Ferranti 206 wore the Plessey logo for about a year (negotiated down from an initial request to emblazon the Plessey name across the fuselage just for'ard of the tailboom and which the Colonel flatly refused).
All great stuff!
Of course had VANG's owners adopted a more
Ferranti-esque approach to the appearance of their craft .. then she may have looked something like this ..
"The VANG" as she might have appeared in 'different' circumstances!