G-AWLL would seem to have been McAlpine's first helicopter and, as suggested, may have begun life as a communications craft for the family. However, there is always the possibility that McAlpine's had a piston ship prior to the arrival of AWLL!
AgustaBell 206B G-AWLL in Gleneagles livery [Perth c. late 70's?] (no additional details)
AWLL was delivered to Sir Robert in July 1968. She was the 21st 206 on the UK register and the 20th AgustaBell variant. From McAlpine's she went to Gleneagles (as mentioned). After Gleneagles she remained a Celtic Ranger for a while longer having been sold in 1983 to F. Lloyd of Clwyd, Wales. As an aside, McAlpine's also owned an HS 125 G-AWWL.
Gleneagle's sister-ship AWOL seen in the post at the top of this page (originally sold to David Brown Tractors in August 1968) was the 24th overall 206 delivered to the UK and the third Bell variant.
Perhaps not so much of a Celtic Ranger as a Ranger in a Celtic province was G-BAUN (below) which, unlike most of her 'indigenous' contemporaries, wore the Saltire (albeit a fairly small one!).
AgustaBell 206B G-BAUN at Inverness c. late 70's (no additional details)