At least the best I know and have seen they are out if BC Canada and play w.ny and n.east in the summer and back out west in the winter enjoy http://www.youtube.com/watch?
v=K9bRggmZQEU&feature=youtube_gdata_player. E vonica is my favorite fiddle player next to venessa but I've never done shots with Vanessa
They are a good band, but I must suggest Gaelic Storm. Here is Rag and Bone, off their newest album. They do a lot of traditional Irish/Celtic music.
EDIT: Here they are in the Dublin Irish Festival, playing a more traditional style of music.
EDIT 2: I just noticed "this side of the pond". D'oh! Actually, I'm not sure where Gaelic Storm is based, but most likely on the other side of the pond. Still, they're a great band.