As this whole area causes confusion and acrimony, can I simply describe how the practise works. Say I play a gig at an Arts Centre, and fill out a PRS form saying what we've played( the PRS uses this random sampling to allocate performing royalties). Say I play the old jig "A Trip to the Lakes". When I recorded that, it goes down as "Trad arranged G Stephens "(with the record company I record with as publisher). That's the information I put on the PRS form. In the fullness of time the PRS computer, with any luck, will allocate me 35 pence or whatever. Considering the time I've spent collecting and researching Cumbrian tunes, I think it's fair I should get that money. If I just put "trad" the money would vanish into an amorphous pool and probably end up in Paul Macartney's pocket or something. I reckon I deserve it. I am emphatically not claiming that I wrote the tune, or expecting anyone else to pay me for playing it(even if they play my version which is different from the tune I originally learnt).