Thanks again Pylon,
Im coming to the same conclusion as the other reviewer I think - (the review has strangely disappeared) but I'll try the voltage measurement. Its a shame as the boards feel and look nicely made.
In the meantime I've ordered one of these:
http://www.ebay.co.uk/itm/MAX31855-Quad-Ch-T-Type-Thermocouple-Breakout-MAX6675-upgrade-3V-Arduino-Comp-/331184452404?
I'll report back on how that one performs....