Hello Alan, thanks for the reply.
Alas I wish it was that simple. however it wasn't. Shall I go on?
I ended up taking my amp apart to see what the problem was and it was that the terminal posts were solid metal which meant there was no scope to use the banana plugs, so I ended up going to Maplins and bought some replacement posts and fitted them myself. - Had my amp still been under warranty I would never have done it, but seeing as my amp was past its warranty, I thought I'd give it a go. It works a treat.