Loch Long is accessible from the River Clyde and the Police helicopter is based at the Clyde heliport. I'm not sure of the sequence of events this morning, but I am pretty sure Police 51 would have routed along the river had they been given a "shout".
I haven't heard which aircraft was involved yet but I know a few that it wasn't !
The main thing is that the pilot is okay, it could have been a lot worse.