Jeezzz, what a bunch of dorks at Dixons!
If it's any comfort, they're just as lame over here in Denmark (however with the odd exceptions, mind)!
Anyway, since I don't own a (qualified) tape-deck anymore
(haven't owned one for years), I'm afraid that I can't help you here!
Don't you know anyone who owns a computer with a decent
soundcard onboard (i.e.: geeky friends or relatives), and are willing to help you out
(by bribing them or extorting them or performing, errr, favours for them in some way)?
If so, then get a signal-cable with phono-plugs in one end
and a 1/8" (I believe it is) mini-jack plug on the other (Dixons should have this).
Use this cable to plug the tape-deck to the computer's
soundcard's line-input (NOT the mike-input) 'n' then record it on the HD.
Subsequently, you can then burn a CD with whatever that used to be on the cassette.
Anyone out there ready to help Steve on this one?