The first UK amateur radio contact on the 241 GHz (1.2mm) band took place on Friday 19th February 2016 at 15:00 GMT
The contact was made between Roger G8CUB/P and Chris G0FDZ/P in locator square JO01EP. The distance was 30 metres and the CW signals were 559 and 589.
With signal to spare both ways an attempt was evaluated to increase the distance to over 50m but with deteriorating weather likely, a decision was taken to limit to 30m as antenna alignment was taking a very long time to achieve.
UK Microwave Group - http://www.microwavers.org/