Thanks Ken.
The wireless only operating from the front was something I had (stupidly) overlooked and not thought about. That rules wireless out then
I've just purchased one from your link above. I was in two minds whether to go for the longer one, and was trying to think of situations were it would be beneficial, and apart from hiding 3 metres away to tempt wildlife near my camera, I couldn't really think of any. I also think I'd get a bit cheesed off when using it normally, with 3 metres of cable dangling around unneeded, so I plumped for the 0.8m job.
£7.99 all in, can't be bad
Now, lets hope that lens doesn't get any bids
Regards