Hello Brian, Afraid i didnt know about your daughter mate,that is a most tragic
loss that someone can endure.My condolences to you and yours!
Regarding ABBA tribute bands,i believe one of the best around now are called ABBA UK and are conveniently based in the midlands! they have a website too, just google them(sorry i dont know how to post a link yet)
hope this helps

ABBO (not ABBA)