Shane, interesting stuff!
Mindful of your interest in Widgeons and Dragonflys I have been in contact with a couple of friends in an effort to glean a little more information .. and images. The information is scarce but I've received a couple more images (including two examples from Italy and which I shall post during the week).
As you know, BEA ran a 'service' between various cities including a destination in Wales and there were also a couple of railway companies who got in on the act although I am still trying to verify whether the railway companies utilised rotorcraft.
Here below is one of the images sent to me after making some enquiries subsequent to your post on the Ferranti thread:
Westland Widgeon S-51 Series 2 G-AKTW in 1948 (Photo uncredited)
First registered to Westlands in February 1948 this craft was then re-registered as G-APPR and sold on to Bristows in November 1961. In June 1962 (still under Bristow's employ) she ventured south to Nigeria.