Thank you all for your advice - didn't mean to start an argument! I will look into both options and weigh them up then decide. Nice to know though that daisy-chaining isn't "an instant fire hazard that must be avoided at all costs" like I have been told!
If you really want to avoid daisy chaining you can probably replace the flex. The leads I have have got a removable panel on them to access the terminals in the multi way head and replacing the flex is no more dificult than rewiring a plug.
If yours also have access to the terminals you could just go to your local diy shop and buy few metres of flex-make sure it's appropriate rating. You may also need a new plug if you can't remove the plug from your extension.