1) is the element open circuit? - if so, it's broke. If not, what should
its resistance be?

That's all you need to test the element. Heating elements of this type don't
change resistance much when hot like light bulbs. Expect to see around the
mid to late twenties in ohms. Possibly a bit more for a top oven. Generally
they are either spot on, open circuit, or (very, very rarely) a dead short.
It isn't normal to have an intermediate, but wrong, resistance.

2) do the teminals supply volts? - if not, further investigation
required (aka a trip to Comet I suspect).

Probably, unless there is some clever control electronics. No need to check,
though. The element test above will be enough to determine if the cooker or
the element is broken. If the element is blown but doesn't start working
after replacement, it may have taken a fuse or something (like a
switch/thermostat) with it.

Christian.