Tunes are used with diferent names in diferent areas for example "Devils Dream "which I heard in the USA is the same tune as "Devil Among the Tailors" in the UK.
Paddy on the Landfill sounds like a name given to a newly composed tune following the titles like Paddy on the Turnpike, and Paddy on the Line. The Landfill seems to me like a modern invention, I even composed a hornpipe which I called "Paddy on the Pipeline" after the Irish ganger who was digging up the road near my house to install a pipe line to carry water from the Keilder Resivoir in Northumberland to Yorkshire.
I have recently composed a hornpipe called "Napoleon crossing the Humber Bridge" after the series of Napoleon crossing titles like "Napoleon crossing the Rhine"
Bill