Taken from the unofficial episode music guide:
"Superfurryanimals - "Mu-Tron"
(from the Ice Hockey Hair EP - Creation 1998 CRESCD288)
This is a lovely Beach-Boys esque instrumental from the Welsh wonders. It is the gloriously soppy music which accompanies Daisy leaving the house and the later scene where she is at the train station."
If you want to look up any more music from the series, the place I looked is here;
http://www.spaced-out.org.uk/s2soundtrack/ep7.html