His musical versatility has endeared him, both on record and/or in concert, to a wide variety of artists such as Smokey Robinson, Randy Crawford, Cleo Laine, The Four Tops, The Drifters, The Temptations, The Three Degrees, Hot Chocolate, Maria Muldaur, Sacha Distel, Lulu, Sir Cliff Richard, Johnny Cash, Victor Borge, Cybil Sheppard, David Soul, Scott Walker, Ute Lemper, Jerry Lewis, Maria Friedman, Dame Shirley Bassey, Barbara Cooke and Chita Rivera.
TV credits include London Tonight, Comic Relief and more. He has worked with The London Symphony Orchestra, The Royal Philharmonic Orchestra, The BBC Radio Orchestra, The BBC Big Band aand many more. Productions include Evita (London), Cats (London) 42nd Street (London), Chess (London), Jesus Christ Superstar (London), Grease (London), Kiss of the Spiderwoman (London), Beauty and the Beast (London), Company (London), Damn Yankees (London), Chicago (London & Lebanon), Witches of Eastwick (London), Bombay Dreams (London), Anything Goes (London), Sinatra (London), Porgy & Bess (London), Mamma Mia (Finland, Israel, China, Switzerland and Hungary), Strictly Gershwin (London) and West Side Story (London).
Allan has also studied extensively with Canadian drum teacher Jim Blackley in Toronto.