[denton-scratch]

Yeah, that sounds like classic Scouse to me, but you certainly hear it in other UK regional accents.

[arrowsmith]

Is it a regional thing? I have a very "standard" middle-class home counties English accent and I use the intrusive r.

[kzrdude]

I'm extremely underqualified (non-native speaker) but first time I heard this and paid attention was from Dave Chinner (linux developer) who is australian and he was using a very pronounced linking r.