Thanks for all your help Jon - you were right (of course), the leads
you mentioned were all that I needed.

Ordered the stereo and leads from http://www.incarexpress.com

All works perfectly and arrived very quickly. Have saved myself a few
quid over local dealers suggesting that I had to use Alpine leads at
£70!!! And the stereo worked out a good £40 cheaper than local
dealers too.

Many thanks