Right, here are the values:

Heater = 6.3V @ 1.6A but I measured 0V

Anode = 470V measured (meant to be @ 100mA - not measured) ?Res = 2kOhm?

Grid 1 = -43.5V measured

Grid 2 = 470V measured (meant to be @ 15mA - not measured)

Grid 3 = 0V measured

k = 95 ohm resistance measured

voltage measured across resistor ? = 0V

pins on valve = 1, 2, 3, 4, 5, 7, 8 (ie NO cathode pin present)

sockets in base = 1 & 8 soldered together (grid 3 & k).

I wasn't able to measure any currents.

So is the bias 0V then? (or -43.5?)

EDIT: I've decided to go for matched quads for the EL34's, and replacement Northern Electric 2C51's for the pre-amp section when I do eventually need new tubes (as the amp still seems to be working nicely even after 3 years of use   ).

Thanx or your help LtCdr and Tbone.