Garmin File for London Helicopter Routes

[RMK]

I’ve just purchased a Garmin Aera 660 and setting up all my routes/waypoints. I was previously using a Garmin 496 and had a file for the London Helicopter Routes, however the file structure is different on the new units, so I cannot just copy it. Would anyone know where I could find a “London Helicopter Routes” file or download?

All the HeliRoute reporting points are already in the new 660 via my chart/map updates, but of course the HeliRoutes are not straight lines between these points.

Thanks in advance for any assistance.