Sorted!

Our sitting room has not been very warm since we had our old gas miser fire removed a few years ago. (under protest, "We didn't fit it so we can't connect the new pipework to it! [not the gas board btw])
We finally got the gas board out to look at replacing the radiator and as a result this one was fitted today! Apparently the old radiator gave out about 20% of the heat needed for a room this size. This one on the other hand when on full, gives out 20% more than is needed.
Sorted!