Technically there is no problem with running VDSL over copper overlay from what I can see... As long as your copper overlay goes by an installed cabinet you should be able to get a FTTC enabled product from BT. And you won't know if that's true until your area is upgraded.
Looking at your postcode on samknows it indicates you are on the Cleveleys exchange which is due to be enabled for fibre September 2012. So keep an eye out for any green box's springing up in your area. Normally they appear near an existing BT boxes, so if you've got one near by you may be in luck.
Just keep an eye on the BT Infinity product checker. And put your number in when September/October comes to see if you can get something.
Connected with O2 Broadband Standard 8.6Mb/1.2Mb