Thanks
I have since found what looks like a pump in the hot press, but it appeared to be swtiched off. When I switch it on, nothing happens so I assume the stove must be up and running before it will pump.
Also, just after my OP, I did a bit of searching and it appears that some of these stoves will heat your back boiler 1st, and then once that is done, will then, by the laws of physics, start to heat your radiators as long as it has the power and heat to do so. I wonder if this is the case in mine?
Must get a big fire blasting later and try it out.